I.FIV5
Piped Stretch Short Without Built-In Brief Length: 4.5"
The Piped Stretch Short by i.FiV5 is an athletic short without built-in brief, featuring a 4.5-inch inseam and made from light, stretch recycled polyester. It includes Polygiene odor-control technology, an adjustable elastic waistband, slit side-seam pockets, and contrast piping with reflective detailing, making it suitable for running and training.
- Material
- Light, stretch recycled polyester fabric
- Gender
- unisex
- Style
- activewear, sustainable, performance
- Category
- Sporting Goods > Athletics > General Purpose Athletic Equipment
Color
Size
Specifications
Lightweight stretch shorts made from recycled polyester with Polygiene odor-control technology, featuring an elastic waist with adjustable drawstring, slit side pockets, and reflective details.
Polygiene odor control, adjustable inner drawstring, slit side-seam pockets, reflective logo, contrast trimmed edging
- Material
- Light, stretch recycled polyester fabric
- Style
- activewear, sustainable, performance
- Occasion
- workout, everyday
- Gender
- unisex
- Age Group
- adult
- Condition
- new
- Category
- Sporting Goods > Athletics > General Purpose Athletic Equipment
Additional Attributes
- lightweight
- stretch fabric
- recycled polyester
- Polygiene odor control
- elastic waist with drawstring
- slit side-seam pockets
- contrast trim
- reflective logo
- 4.5" inseam
- without built-in brief
Product Insights
I.FIV5's Piped Stretch Short (4.5" inseam) delivers permanent Polygiene odor control that lasts the garment's lifetime, eliminating bacteria and reducing laundry frequency, which lowers environmental footprint by a third. The linerless, relaxed cut allows pairing with any underwear or compression layer for chafe-free comfort, while the 20-gram distal fabric mass reduction improves running economy. At $59 CAD, it bundles recycled polyester and Polygiene—a feature typically found in premium outdoor brands—but slit pockets (6 inches deep) may not secure larger phones.
- Permanence
Odor control lasts the garment's lifetime and survives weeks of sweaty wear without washing.
Why this is supported
The treatment is permanently bonded at finishing, meaning it never washes out.
Polygiene is a permanent treatment bonded to the fabric, so it lasts the lifetime of the garment and does not wash out.
How many washes does the Polygiene odor control treatment last before losing effectiveness?Independent field tests confirm this durability:
I wore the T-Shirt for 20 hours over two weeks without washing.
gearjunkie.comand
I wore them for over 5 hours of running and indoor cycling without washing.
ptmollie.comboth with little to no odor.
- Safety
Polygiene holds bluesign and Oeko-Tex certifications and is skin-safe for prolonged wear.
Why this is supported
Polygiene holds multiple safety certifications:
Polygiene StayFresh is bluesign® and Oeko-tex® Eco Passport certified.
mp.comSensitivity testing further confirms it is safe for prolonged skin contact:
All our treatments have undergone extensive sensitivity testing and are completely safe – even when used for long periods.
polygiene.comAnd it does not interfere with skin bacteria:
Polygiene® StayFresh is only active in the material so it doesn’t interfere with any natural bacteria on the skin.
polygiene.com- Environmental impact
Polygiene reduces environmental footprint by a third through less washing; uses no extra resources in application.
Why this is supported
Polygiene's life cycle analysis shows significant environmental savings:
According to the LCA that Polygiene recently published you can reduce the environmental impact of garments by a third by skipping every other wash, saving 51 kWh and 3,800 litres of water a year.
mp.comAnd the application itself is resource-efficient:
it's added during the finishing stage, there's no additional energy or water required during the application
polygiene.comThis is corroborated by additional sources:
It is co-applied in the finishing stages of garment manufacturing so no extra water is used.
roadtrailrun.com- Prestige
At $59 CAD, these shorts include Polygiene, a feature typically reserved for premium outdoor brands.
Why this is supported
Polygiene is widely adopted by elite outdoor brands:
Many other popular running and outdoor brands are using Polygiene in some of their products including Patagonia, adidas, Athleta, LL Bean, Arc' Teryx and many other.
roadtrailrun.comYet on these $59 shorts, it's standard:
Polygiene — a permanent, silver-salt-based odor-control treatment — is a feature typically reserved for premium activewear brands, yet it's standard on these shorts
I.FIV5: the private label behind this short — polygiene_odor_controlThe same technology appears across the entire I.FIV5 activewear collection.
- Layering
Linerless shorts fit with any underwear or compression layer, relaxed cut.
Why this is supported
Lined shorts have a built-in inner layer, but linerless designs leave the choice to the wearer:
Unlined shorts have no inner layer, offering a more traditional design. They rely on the wearer to pair them with their choice of undergarments or compression layers.
modaknits.comThis means you can use compression gear or personal underwear, as explained:
You’ll need to wear them with underwear, compression shorts, or tights underneath.
goaluniform.comSerious runners prefer quality boxer briefs, with one editor stating,
Instead of a liner that functions as underwear, I just wear underwear that functions as a liner — read good-quality boxer briefs.
gearjunkie.comThe I.FIV5 shorts complement this with a relaxed leg cut that avoids a constricted feel when layering.
- Odor control
Permanent Polygiene on the shell eliminates odor and bacteria, substituting for a liner.
Why this is supported
The I.FIV5 shorts use a linerless design, so odor control is handled by the shell itself via
Polygiene® technology that eliminates odour and prevents bacteria growth
lyst.com. This treatment is not a wash-in additive but
a permanent treatment bonded to the fabric, so it lasts the lifetime of the garment and does not wash out.
How many washes does the Polygiene odor control treatment last before losing effectiveness?, therefore the shorts stay odor-resistant without needing reapplication.
- Mobility
Linerless 4.5-inch inseam maximizes mobility for sprints, HIIT, and plyometrics.
Why this is supported
The 4.5-inch inseam avoids excess fabric, and the absence of a liner eliminates restrictive layers. Gear editors note that inseams around 5 inches are ideal for
HIIT, sprints, calisthenics. Maximum mobility and ventilation
myselfstudio.ptso the I.FIV5's 4.5-inch cut fits into the same high-mobility category.
- Value
At $59 CAD, the shorts bundle recycled polyester and Polygiene, reducing laundry frequency and environmental impact.
Why this is supported
Retailing at $59 CAD from Simons, these shorts combine two features typically reserved for premium activewear:
Light, stretch recycled polyester fabric
lyst.comand
Polygiene® technology that eliminates odour and prevents bacteria growth
lyst.com. The latter enables less frequent washing; Polygiene's lifecycle assessment indicates that
According to the LCA that Polygiene recently published you can reduce the environmental impact of garments by a third by skipping every other wash, saving 51 kWh and 3,800 litres of water a year.
mp.comThus, the $59 price delivers both immediate value and potential environmental savings.
- Performance
Cuts distal fabric mass by roughly 20 grams to improve running economy.
Why this is supported
The 4.5-inch inseam reduces fabric mass by about 20 grams per short compared to longer cuts, which
Even a 20-gram difference in fabric weight can impact your efficiency over a marathon distance.
2xu.comThe shorter cut also exposes more thigh surface, and
Shorter inseams facilitate faster heat dissipation through increased skin exposure, allowing your internal cooling systems to function at peak efficiency.
2xu.comThus, the inseam contributes to both running economy and temperature regulation during sustained effort.
- Linerless design
Unlined design lets runners choose their own briefs for chafe-free comfort.
Why this is supported
Road runners often favor unlined shorts as a lightweight shell, preferring to wear their own boxer briefs. One experienced runner explains,
Instead of a liner that functions as underwear, I just wear underwear that functions as a liner — read good-quality boxer briefs.
gearjunkie.comThis 4.5-inch shorts suit that practice, offering chafe-proof layering for long runs.
- Eco synergy
Recycled polyester + Polygiene cuts wash impact by a third.
Why this is supported
By pairing recycled polyester with Polygiene, the shorts leverage a dual sustainability benefit. One description notes:
Pairing Polygiene with the short's recycled polyester fabric creates a dual-benefit sustainability profile
How Polygiene keeps the shorts fresh for longer — eco_synergy_with_recycled_polyester. A lifecycle assessment from Polygiene quantifies this:
you can reduce the environmental impact of garments by a third by skipping every other wash, saving 51 kWh and 3,800 litres of water a year.
mp.comThis verifies that the combination can cut wash-related impact by a third.
- Polygiene treatment
Permanent silver chloride odor control lasts lifetime, certified skin-safe.
Why this is supported
The shorts' unlined design sits the treated shell directly against the wearer, making permanent odor control especially important. Polygiene is integrated into the fabric:
This advanced antibacterial textile solution is integrated into the fabric, so freshness is built-in for the lifetime of the garment.
polygiene.comThe active ingredient is silver chloride,
a salt that is naturally present in water and soil.
polygiene.comand the technology holds
bluesign® and Oeko-tex® Eco Passport certified
mp.comstatus confirming no harmful additives and safety for prolonged skin contact. The combination of recycled polyester and Polygiene is a collection-wide design principle across I.FIV5 activewear.
- Design origin
I.FIV5 shorts are designed in Canada.
Why this is supported
The product description confirms:
i. FiV5 by Simons: an exclusive designed in Canada
lyst.com. This aligns with I.FIV5's brand identity as a Canadian-designed activewear line.
- Design and materials
I.FIV5 shorts feature the brand's consistent recycled polyester and Polygiene, with a linerless design.
Why this is supported
The same light, stretch recycled polyester appears across I.FIV5's line.
Polygiene® technology that eliminates odour and prevents bacteria growth
modesens.comis applied consistently. The linerless design is intentional:
Unlined shorts have no inner layer, offering a more traditional design. They rely on the wearer to pair them with their choice of undergarments or compression layers
modaknits.com. As a result,
Because there is no integrated brief to provide moisture-wicking or odor resistance, I.FIV5 applies a permanent Polygiene treatment directly to the recycled polyester shell
Going without a built‑in brief: who it’s for and why — polygiene_odor_control_on_an_unlined_shell.
- Pocket security
Slit pockets 6 inches deep hold most phones securely; larger models may protrude.
Why this is supported
slit-style and about 6 inches deep
How deep are the side pockets and can they securely hold a phone while running?a larger phone may partially stick out
How deep are the side pockets and can they securely hold a phone while running?Reviewers note they are fine for running
How deep are the side pockets and can they securely hold a phone while running?, confirming the pocket design works well for running with minimal bounce and accessible fit.
Image Analysis
2 images- 01
Product
Right-side view of black athletic shorts with an elastic waistband, vertical white side piping, and a vertical side pocket slit; fabric appears smooth and matte. The image includes the wearer from waist to mid-thigh showing the shorts on the right hip and thigh.
- Overall shapeKnee-above athletic short silhouette with a straight hem and relaxed fit on the thigh visible from the right-side view.
1 region
x 0.06 · y 0.34 · w 0.88 · h 0.55 (high) - WaistbandElastic gathered waistband with visible elastic casing at the top of the shorts; waistband sits at the wearer’s natural waist.
1 region
x 0.10 · y 0.18 · w 0.55 · h 0.12 (high) - Side pipingSingle narrow white vertical piping that runs along the outer right side seam from waist toward hem, ending just above the hem with a short white tab at the hem.
2 regions
x 0.73 · y 0.22 · w 0.10 · h 0.62 (high); x 0.79 · y 0.77 · w 0.03 · h 0.07 (high) - Side pocket openingVertical pocket slit on the right hip aligned roughly with the side seam, with visible stitching around the opening.
1 region
x 0.64 · y 0.34 · w 0.16 · h 0.28 (high) - Fabric textureSmooth, matte woven or knit athletic fabric with minimal visible surface texture; slight drape and faint sheen from lighting.
1 region
x 0.10 · y 0.30 · w 0.68 · h 0.48 (high) - Hem stitchingVisible double-row topstitching along the bottom hem of the shorts.
1 region
x 0.08 · y 0.78 · w 0.68 · h 0.12 (high) - Visible torso overlapLower portion of a matching black top with white piping overlaps the waistband on the left side of the image.
1 region
x 0.06 · y 0.06 · w 0.58 · h 0.24 (high) - Model skin visibleRight arm and upper right thigh of the wearer are visible, showing medium brown skin tone and hair texture on the thigh.
2 regions
x 0.72 · y 0.05 · w 0.22 · h 0.42 (high); x 0.18 · y 0.78 · w 0.34 · h 0.20 (high)
Other
Studio product shot cropped from mid-torso to mid-thigh; neutral light grey background, soft even lighting, minimal shadows, and slight reflection on fabric.
- Shot compositionTight crop showing the right-side of the shorts and part of the torso and thigh; product centered horizontally with some right-side margin.
1 region
x 0.06 · y 0.06 · w 0.88 · h 0.88 (high) - BackgroundEven light grey studio background with no visible texture or props.
- Lighting and shadowSoft, diffuse lighting from the front-left producing gentle shadowing on the inner right thigh and slight highlight on fabric folds.
- Image qualityHigh-resolution, sharp focus on the shorts and nearby fabric details; no visible compression artifacts.
Colors
black· main fabric#1B1B1Ewhite· side piping- Overall shapeKnee-above athletic short silhouette with a straight hem and relaxed fit on the thigh visible from the right-side view.
- 02
Product
Rear view of black athletic shorts with an elastic waistband, contrasted white piped trim following the back yoke and side seams, and a small square logo near the right hem.
- Rear panel shapeBack of the shorts shows a two-panel construction meeting at a center seam with gentle vertical drape lines.
1 region
x 0.12 · y 0.28 · w 0.76 · h 0.44 (high) - Elastic waistbandElasticated waistband with gathered fabric visible along the top of the shorts.
1 region
x 0.18 · y 0.16 · w 0.64 · h 0.08 (high) - Piped trimContrasting white piped trim runs across the back yoke and continues down the side seams, forming a curved decorative line.
3 regions
x 0.12 · y 0.20 · w 0.76 · h 0.18 (high); x 0.06 · y 0.28 · w 0.32 · h 0.50 (high); x 0.62 · y 0.28 · w 0.32 · h 0.50 (high) - Hem constructionStraight hem at leg openings with visible double-needle topstitching.
1 region
x 0.10 · y 0.72 · w 0.80 · h 0.12 (high) - Logo markSmall square logo patch positioned near the lower right front of the right short leg (viewer right), in a contrasting light gray.
1 region
x 0.78 · y 0.60 · w 0.08 · h 0.08 (high)
Other
Studio shot showing the model from the waist to mid-thigh against a plain light gray background; model's hands and part of a black top are visible. Even soft lighting with mild shadows around the legs.
- Viewing angleRear-facing shot of a model wearing the shorts, centered on the lower torso and upper legs.
- Background and stagingNeutral light gray seamless background with no props.
- Model visible partsModel's bare thighs and forearms are visible; a black top is tucked into the waistband.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (low) - Lighting and shadowSoft diffuse studio lighting producing gentle shadows under the hem and between the legs.
Colors
matte black· shorts main fabric#0E0D0Ebright white· piped trimlight gray· logo patch- Rear panel shapeBack of the shorts shows a two-panel construction meeting at a center seam with gentle vertical drape lines.