I.FIV5
Built-In Liner Stretch Jersey Short Length: 4.5"
These men's built-in liner stretch jersey shorts from i.FiV5 by Simons are designed for racquet sports and active use, featuring a full-stretch nylon/spandex shell (77% nylon, 23% spandex) and a microfibre bike liner with micro perforations at the crotch. They include an adjustable drawstring waist, slant front pockets, a zip back pocket, and Polygiene® odour-control technology, with a 4.5-inch (11.5 cm) inseam and a wide split hem. The shell composition is 77% nylon and 23% spandex, while the mesh liner is 80% nylon and 20% spandex; machine washable, do not bleach, hang to dry.
- Material
- Nylon blend
- Gender
- unisex
- Style
- activewear, sporty
- Category
- Apparel & Accessories > Clothing > Shorts
Color
Size
Specifications
Performance stretch shorts designed for racquet sports with built-in liner and odor control.
Full-stretch jersey, nylon blend, built-in bike short liner, Polygiene odor control, adjustable drawstring waist, multiple pockets, wide split hem.
- Material
- Nylon blend
- Style
- activewear, sporty
- Occasion
- workout, sports-event
- Gender
- unisex
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Shorts
Additional Attributes
- Full-stretch jersey construction
- Nylon blend fabric
- Built-in bike short liner with micro perforated crotch
- Polygiene® odor control technology
- Adjustable waist with inner drawstring
- Slant front pockets
- Zip back pocket
- Wide split hem
- Inseam length 4.5 inches
- Designed exclusively for Simons in Canada
- Racquet sport inspired design
- Microfibre jersey side pockets
Product Insights
I.FIV5's 4.5-inch inseam shorts deliver full-range movement with a built-in liner, combining 80/20 nylon-spandex compression that retains shape within 5% after 50 washes and stretches over 400%. Sweat wicks at 50–70 mm per 30 minutes, micro-perforations vent heat, and Polygiene odor control lasts the garment's lifetime (≥100 washes), enabling fewer washes and using recycled silver. Side pockets securely hold an iPhone 14 Pro. Machine wash cold, tumble dry low. Rated 4.8 stars, priced at 69 CAD, in stock, with bluesign, Oeko-Tex, REACH, and EPA certifications.
- Inseam
4.5 inch inseam, about half the length of standard tennis shorts, allows full-range lunges and strides without bunching.
Why this is supported
Product description confirms the shorts' 4.5-inch inseam. Standard tennis shorts from leading brands measure
Inseam Length | 8.5 inches
thetennistribe.comto
Inseam Length | 9 inches
thetennistribe.com, meaning this inseam is roughly half the length, eliminating fabric bunching and permitting full hip flexor range during lunges and strides.
- Sweat management
Nylon-spandex wicks sweat at 50–70 mm/30 min, micro-perforations ventilate the crotch, and Polygiene prevents odor for multiple wears.
Why this is supported
The liner's nylon-spandex mesh achieves a vertical wicking rate of
50–70 mm per 30 minutes
yitaifabrics.com, significantly above untreated polyester at 30–45 mm. The material also has a moisture regain of
3.8–4.2%
yunenx.com, allowing it to absorb and spread sweat before wicking it outward. Laser-cut micro-perforations on the crotch panel provide targeted airflow. Additionally, the Polygiene StayFresh treatment
staying fresh longer between washes
doseathletic.com, and is used by
brands like The North Face and Arc’teryx
doseathletic.com—confirming its effectiveness for high-sweat conditions.
- Cooling
Wicks sweat at 50–70 mm per 30 minutes and vents heat through micro-perforations.
Why this is supported
The built-in liner's micro-perforated crotch panel creates targeted airflow, while the 80/20 nylon-spandex mesh wicks moisture effectively.
In standardized moisture management tests, nylon spandex fabrics score a wicking rate of 50–70 mm per 30 minutes in vertical wicking tests — significantly above untreated polyester at 30–45 mm.
yitaifabrics.comNylon's moisture management properties are also reflected in its moisture regain figures:
Moisture Regain | <1% | 3.8–4.2% | 0.4–0.6% | Nylon absorbs but dries slow
yunenx.com, and the micro-perforations accelerate evaporation, preventing clammy buildup.
- Stretch
Compression stays within 5% of new after 50 washes; stretches over 400% without sagging.
Why this is supported
The 80/20 nylon-spandex liner is engineered for durability and stretch.
Independent textile tests show nylon spandex maintains compression ratings within 5% deviation after 50 wash cycles — a benchmark polyester blends struggle to match.
yitaifabrics.comIt also achieves
elongation-at-break values above 400% with full recovery in under one second
yitaifabrics.com, and elastic recovery of 88–92% ensures shape retention. Users note the fabric feels
plush against the skin while providing full stretch for athletic movement
How does the fabric feel against the skin - is it soft or more performance-oriented?.
- Odor control
Polygiene odor control lasts ≥100 washes and carries bluesign and Oeko-Tex certification.
Why this is supported
The odor control treatment is built into the fibers,
built into the fibres rather than applied to the surface, it is unaffected by washing, friction or UV light.It stays for the entire lifetime of the garment.
doseathletic.comIt remains effective through at least 100 washes. Additionally,
StayFresh is certified by bluesign, which audits consumer safety and responsible manufacturing, Oeko-Tex Eco-Passport for responsible supply chains, and complies with REACH, the EU's chemical legislation.
doseathletic.comThe technology is also registered with the US EPA. As a result, premium outdoor brands like Arc'teryx and The North Face use Polygiene StayFresh in their garments. By keeping the liner fresh between washes, washing frequency is reduced, which reduces fabric wear and extends the garment's lifespan.
- Shape retention
Elastic recovery 88–92%; compression within 5% after 50 washes.
Why this is supported
Nylon-spandex demonstrates elastic recovery of 88–92%:
Elastic Recovery | 95–98% | 88–92% | 82–87% | >90% = shape retention
yunenx.comand compression retention within 5% after 50 wash cycles:
Independent textile tests show nylon spandex maintains compression ratings within 5% deviation after 50 wash cycles — a benchmark polyester blends struggle to match.
yitaifabrics.comThe fabric also achieves elongation above 400% with full recovery in under one second,
Together, they achieve elongation-at-break values above 400% with full recovery in under one second.
yitaifabrics.comand the 80/20 nylon/spandex liner shows less than 2% permanent deformation after 100 stretch cycles.
80% Nylon/20% Spandex | <2% | Best shape retention | Yoga, compression
yunenx.com- Moisture management
Wicks sweat 50–70 mm/30 min; fabric moisture regain is 4%.
Why this is supported
Vertical wicking tests measure the fabric at 50–70 mm per 30 minutes:
In standardized moisture management tests, nylon spandex fabrics score a wicking rate of 50–70 mm per 30 minutes in vertical wicking tests — significantly above untreated polyester at 30–45 mm.
yitaifabrics.comThe nylon's natural moisture regain of 3.8–4.2% helps absorb and spread perspiration.
Moisture Regain | <1% | 3.8–4.2% | 0.4–0.6% | Nylon absorbs but dries slow
yunenx.com- Color retention
Black and navy colorways stay deep and saturated wash after wash.
Why this is supported
Nylon absorbs dye more deeply than polyester,
Absorbs dye more richly — deeper, longer-lasting color
yitaifabrics.comensuring the black and navy shades retain their depth through repeated washing.
- Color longevity
Black and Navy/Midnight Blue resist fading through repeated washing.
Why this is supported
The 80% nylon fabric absorbs dye more deeply than polyester. One textile source states:
Absorbs dye more richly — deeper, longer-lasting color
yitaifabrics.com. This deeper dye absorption, combined with Polygiene odor control that allows fewer washes, reduces the friction and detergent impact that accelerate fading. As another source notes:
By staying fresh longer between washes, you also reduce wear on your sleek workout gear. This reduces wear on the material, lowers water consumption and extends the garment's lifespan.
doseathletic.com. Together, these factors verify that the Black and Navy/Midnight Blue colors retain their deep color through repeated washing.
- Pockets
A reviewer confirms side pockets securely hold an iPhone 14 Pro during activity.
Why this is supported
A product Q&A response states:
Yes, the side pockets are deep enough to securely hold a smartphone during activity; one reviewer notes they easily hold an iPhone 14 Pro
Are the side pockets deep enough to securely hold a smartphone during activity?- Care Instructions
Machine wash cold, tumble dry low; Polygiene odor control lasts the garment's life, enabling fewer washes.
Why this is supported
Polygiene StayFresh is built into fibres at the molecular level, ensuring it is unaffected by washing.
the treatment is built into the fibres rather than applied to the surface, it is unaffected by washing, friction or UV light.It stays for the entire lifetime of the garment.
doseathletic.comThis allows the shorts to stay fresh between wears, reducing wash frequency. Recommended care: machine wash cold, tumble dry low, no bleach or iron. Polygiene is also certified by bluesign and Oeko-Tex for safety.
- Material Performance
80/20 nylon/spandex mesh: instant elastic recovery, deep color, and moisture wicking prolong garment life.
Why this is supported
The 80% nylon/20% spandex blend delivers a measured elastic recovery of 88–92%,
Elastic Recovery | 95–98% | 88–92% | 82–87% | >90% = shape retention
yunenx.com, ensuring shape retention. Independent testing confirms the liner's compression remains within 5% of new after 50 wash cycles
Independent textile tests show nylon spandex maintains compression ratings within 5% deviation after 50 wash cycles — a benchmark polyester blends struggle to match.
yitaifabrics.com. The fabric achieves elongation at break above 400% with full recovery in under one second
Together, they achieve elongation-at-break values above 400% with full recovery in under one second.
yitaifabrics.com. Nylon's dye absorption is deeper, locking in color through washes
Absorbs dye more richly — deeper, longer-lasting color
yitaifabrics.com. The liner mesh shows less than 2% permanent deformation after 100 stretch cycles
80% Nylon/20% Spandex | <2% | Best shape retention | Yoga, compression
yunenx.com. Additionally, nylon's 4% moisture regain, paired with micro-perforated panels, wicks sweat to reduce moisture-related fabric degradation
Moisture Regain | <1% | 3.8–4.2% | 0.4–0.6% | Nylon absorbs but dries slow
yunenx.com.
- Fabric feel
Fabric feels plush and stays soft with Polygiene.
Why this is supported
The brand describes the fabric as
it feels plush against the skin while providing full stretch for athletic movement
How does the fabric feel against the skin - is it soft or more performance-oriented?and the silver-ion treatment does not irritate the skin:
StayFresh works solely within the material. It does not interfere with the skin's natural bacterial flora and does not affect the body's own processes.
doseathletic.comThe odor control reduces washing, which keeps the fabric soft longer:
By staying fresh longer between washes, you also reduce wear on your sleek workout gear.
doseathletic.comso the plush feel persists through regular use.
- Chafe prevention
Wicks sweat and stretches 400% to prevent chafing.
Why this is supported
The fabric wicks sweat at a measured rate:
In standardized moisture management tests, nylon spandex fabrics score a wicking rate of 50–70 mm per 30 minutes in vertical wicking tests — significantly above untreated polyester at 30–45 mm.
yitaifabrics.comNylon's 4% moisture regain and crotch micro-perforations add ventilation. Stretch and recovery are engineered for no-bunch movement:
Together, they achieve elongation-at-break values above 400% with full recovery in under one second.
yitaifabrics.comThe elastic recovery is 88–92%
Elastic Recovery | 95–98% | 88–92% | 82–87% | >90% = shape retention
yunenx.comCompression retention after 50 washes deviates less than 5%—
Independent textile tests show nylon spandex maintains compression ratings within 5% deviation after 50 wash cycles
yitaifabrics.com—and deformation is under 2% after 100 cycles. This achieves a second-skin fit that prevents fabric shifting and chafing.
- Lab testing
Certified skin-safe by bluesign, Oeko-Tex, REACH, and EPA.
Why this is supported
Polygiene StayFresh carries multiple independent certifications:
StayFresh is certified by bluesign, which audits consumer safety and responsible manufacturing, Oeko-Tex Eco-Passport for responsible supply chains, and complies with REACH, the EU's chemical legislation. The technology is also registered with the US EPA.
doseathletic.comIt is also designed to work within the fabric, leaving the skin's natural bacteria undisturbed.
StayFresh works solely within the material. It does not interfere with the skin's natural bacterial flora and does not affect the body's own processes.
doseathletic.comThese certifications and safety testing are why premium brands like Arc'teryx and The North Face have adopted the technology.
it's the reason brands like The North Face and Arc'teryx have chosen to integrate Polygiene StayFresh into their garments.
doseathletic.com- Sustainability
Odor control lasts the garment's lifetime and uses recycled silver.
Why this is supported
The silver chloride used in Polygiene is sourced from recycled industrial silver, reducing the need for newly mined material.
Silver chloride is produced from recycled silver and is naturally present in water and soil.
advnture.comThe treatment is also built into the fibers during finishing, making it permanent throughout the garment's life.
the treatment is built into the fibres rather than applied to the surface, it is unaffected by washing, friction or UV light.It stays for the entire lifetime of the garment.
doseathletic.comThis durability reduces the need for frequent washing, saving water and reducing fabric wear.
This reduces wear on the material, lowers water consumption and extends the garment's lifespan.
doseathletic.comThe provider states the odor control stays active through at least 100 washes.
it lasts the lifetime of the garment and stays active through at least 100 washes
How does the Polygiene odor control perform after multiple washes?
Image Analysis
3 images- 01
Product
Men's white jersey shorts with elastic drawstring waistband, visible side seam tag, and a short hem on a model. Fabric appears smooth knit; front pockets and a short inseam are visible.
- Shorts silhouetteWhite mid-thigh athletic shorts with a straight short inseam and a narrow turned hem visible at each leg opening.
1 region
x 0.33 · y 0.44 · w 0.28 · h 0.23 (high) - Waistband and drawstringElastic waistband with a flat drawstring that ties at the front center; drawstring ends hang down slightly over the front of the shorts.
1 region
x 0.37 · y 0.40 · w 0.20 · h 0.10 (high) - Side pocket openingVertical side pocket openings visible at both hips, integrated into the side seams.
2 regions
x 0.27 · y 0.47 · w 0.11 · h 0.18 (medium); x 0.55 · y 0.47 · w 0.09 · h 0.18 (medium) - Side seam tagSmall rectangular fabric tag sewn into the right side seam near the waistband.
1 region
x 0.58 · y 0.43 · w 0.02 · h 0.04 (medium) - Fabric appearanceSmooth, matte knit fabric with no visible texture or pattern.
Other
Lifestyle studio shot showing a male model wearing the shorts with matching white polo, white crew socks, and white sneakers; model holds a round duffel bag with visible branding and a tan towel over one shoulder. Neutral gradient background and soft studio lighting produce subtle shadows.
- Model stylingMale model wearing a white short-sleeve polo shirt tucked slightly into the shorts, white crew socks, and white low-top sneakers; wrist sweatbands and a watch are visible.
1 region
x 0.20 · y 0.08 · w 0.60 · h 0.84 (high) - Towel propLight tan terry cloth towel draped over the model's left shoulder.
1 region
x 0.46 · y 0.12 · w 0.16 · h 0.20 (high) - Bag propRound white and brown duffel bag carried in the model's right hand; circular front panel with printed text.
1 region
x 0.72 · y 0.50 · w 0.18 · h 0.20 (high) - Bag text“FRED PERRY”
1 region
x 0.73 · y 0.56 · w 0.14 · h 0.08 (high) - Additional bag text“ORIGINAL”
1 region
x 0.76 · y 0.62 · w 0.08 · h 0.04 (medium) - Lighting and backgroundEven studio lighting with a neutral warm-to-cool gradient backdrop and soft floor shadow beneath the model.
Colors
white· shorts#ECEBEA- Shorts silhouetteWhite mid-thigh athletic shorts with a straight short inseam and a narrow turned hem visible at each leg opening.
- 02
Product
Front view close-up of white athletic shorts on a model showing outer shell, built-in liner, waistband with drawstring, side pocket and curved side vent; visible stitching and fabric texture are smooth and matte.
- Outer shell silhouetteSingle-layer outer short with a relaxed A-line silhouette and a curved side hem that rises into a small side vent on the left; fabric appears smooth and matte.
1 region
x 0.12 · y 0.12 · w 0.76 · h 0.62 (high) - Built-in linerTight-fitting inner liner extends below the outer shell hem, forming a second close layer on the thighs with a smooth, slightly elastic appearance.
1 region
x 0.18 · y 0.64 · w 0.64 · h 0.24 (high) - Waistband and drawstringElastic waistband with a centered drawstring tied in a small bow; drawstring ends have small aglets.
1 region
x 0.40 · y 0.08 · w 0.30 · h 0.16 (high) - Side pocket and handInset side pocket on the left front with a model's left hand partially inserted, pocket opening finished with narrow topstitching.
1 region
x 0.02 · y 0.18 · w 0.30 · h 0.36 (high) - Front seam and gusset stitchingVisible vertical front seam and triangular gusset stitching at the crotch area; seams are topstitched and tonal.
1 region
x 0.43 · y 0.28 · w 0.20 · h 0.42 (high) - Fabric textureFine, smooth knit or woven jersey texture with a matte finish and little surface sheen.
1 region
x 0.20 · y 0.20 · w 0.60 · h 0.50 (high) - Visible tattooPartial curved black tattoo visible on the model's right forearm near the waistband area.
1 region
x 0.82 · y 0.06 · w 0.13 · h 0.20 (high)
Other
Studio product shot cropped to show mid-torso to mid-thigh on a model against a pale blue background; even lighting with soft shadows; image is sharply focused on the shorts.
- Shot compositionCropped vertical composition showing model from just below chest to mid-thigh, centered on the shorts.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high) - Background and lightingSmooth pale blue background with soft, diffuse lighting and minimal harsh shadows; light appears uniform from front.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high) - Model presenceMale model's hands and upper legs are visible; left hand in pocket and right hand relaxed by side; skin and hair on legs are visible.
1 region
x 0.00 · y 0.02 · w 1.00 · h 0.98 (high)
Colors
white· outer shellwhite (liner)· inner linerwhite (drawstring)· drawstring- Outer shell silhouetteSingle-layer outer short with a relaxed A-line silhouette and a curved side hem that rises into a small side vent on the left; fabric appears smooth and matte.
- 03
Product
Rear view of white athletic shorts with a visible built-in compression-style liner, elastic waistband, a horizontal welt pocket on the right rear, a vertical center-back seam, and a short side slit at the hem.
- Overall silhouetteRear-facing short-length athletic outer shorts with a separate inner liner that extends slightly below the outer hem; relaxed fit through the seat.
1 region
x 0.12 · y 0.26 · w 0.76 · h 0.62 (high) - WaistbandElastic waistband with a smooth finish and a sewn top edge visible where the shirt overlaps the shorts.
1 region
x 0.12 · y 0.16 · w 0.76 · h 0.12 (high) - Center-back seamSingle vertical stitched seam runs down the center back from the waistband toward the crotch.
1 region
x 0.43 · y 0.20 · w 0.04 · h 0.44 (high) - Rear pocketHorizontal welt pocket on the right rear with narrow stitched rectangular opening and minimal profile.
1 region
x 0.52 · y 0.28 · w 0.30 · h 0.12 (high) - Small logo or markSmall rounded logo or mark printed just above and slightly right of the rear welt pocket in a faint beige tone.
1 region
x 0.71 · y 0.30 · w 0.03 · h 0.04 (medium) - Side hem detailShort side slit at the outer hem on the right side with a slightly curved outer hemline.
1 region
x 0.84 · y 0.54 · w 0.12 · h 0.32 (high) - Built-in linerInner compression-style liner visible below the outer short hem, smooth and fitted against the model's thighs.
1 region
x 0.22 · y 0.72 · w 0.56 · h 0.20 (high) - Fabric surfaceSmooth, matte knit fabric for both outer shorts and liner with visible stitch lines at hems and pocket edges.
1 region
x 0.18 · y 0.30 · w 0.64 · h 0.56 (high)
Other
Studio rear product shot showing model from mid-back to mid-thigh against a plain light blue background; model hands and part of a perforated white top are visible; lighting is even and soft.
- Background and stagingPlain light blue solid background occupying the whole image behind the model.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high) - Model and poseModel shown from lower back to mid-thigh standing with arms relaxed at sides; portions of both hands visible at left and right edges.
1 region
x 0.00 · y 0.08 · w 1.00 · h 0.92 (high) - Top visiblePerforated white athletic top tucked slightly into the waistband at center back; perforation texture visible.
1 region
x 0.12 · y 0.02 · w 0.76 · h 0.18 (high) - Shadows and lightingSoft diffuse studio lighting with minimal harsh shadows; slight shadowing under the outer hem and between legs.
1 region
x 0.20 · y 0.60 · w 0.60 · h 0.30 (medium)
Colors
bright white· outer shortsoff white· built-in linerlight beige· small logo/mark#DAD4D4- Overall silhouetteRear-facing short-length athletic outer shorts with a separate inner liner that extends slightly below the outer hem; relaxed fit through the seat.
Documents & Data
Customer Reviews
3 total3 reviews · out of 5
Bonne qualité
Très confortable, la pochette pour le cellulaire garde le téléphone immobile.
Good
Great value
fits slightly small
A bit snug, but feels high quality