I.FIV5
Split-Hem Short 4" Length
Split-Hem Short 4" Length is an athletic short from i.FiV5 by Simons' MOTION collection, featuring a loose outer layer with side slits over a built-in micro-perforated bike short liner with a patch pocket. Designed for athletes in motion, it is suited for running and training, with a high adjustable waist and side splits that allow a full stride. The shorts are made from lightweight stretch recycled polyester with Polygiene odour-control technology and a reflective logo, and they have a 4-inch (10 cm) inseam.
- Material
- Light, stretch recycled polyester fabric
- Gender
- female
- Style
- sporty, performance, slim-fit
- Category
- Apparel & Accessories > Clothing > Activewear
Color
Size
Specifications
Athletic short with built-in bike short, high waist, and split hem for motion
Lightweight stretch recycled polyester, Polygiene odor control, adjustable toggle waist, reflective logo
- Material
- Light, stretch recycled polyester fabric
- Style
- sporty, performance, slim-fit
- Occasion
- workout, sports-event
- Gender
- female
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Activewear
Additional Attributes
- Exclusive i.FiV5 by Simons design, Canada
- Two pronounced side slits for improved stride
- Lightweight stretch recycled polyester fabric
- Built-in micro-perforated bike short with patch pockets
- Polygiene technology for odor elimination and bacteria prevention
- Adjustable toggle high waist
- Reflective i.FiV5 logo
- 4-inch inseam length
Product Insights
The Split-Hem Short 4" Length by I.FIV5 uses a split hem and side slits to draw air across the thigh for active cooling, minimize inner-thigh chafing, and allow full stride and deep squat mobility. It features a permanent Polygiene odor control, a high-rise adjustable waistband with locking cord, and a built-in phone pocket that stays secure and hidden under the loose outer layer. Made from recycled polyester that reduces CO₂ emissions by 30–60% without performance loss, it offers a phone pocket, adjustable waist, and split hem typically missing at its 59 CAD price, undercutting competitors like Tracksmith's Twilight Shorts by 39%. Two pairs can last a week of workouts, and the micro-perforated inner liner vents across the leg to reduce clamminess, while the outer shorts fit loosely over a compressive liner with opaque, quick-drying fabric.
- Ventilation
Split hem opens during leg motion, drawing air across the thigh for active cooling.
Why this is supported
The side split creates a bellows effect with each stride, actively drawing air across the thigh.
The split itself can also contribute to ventilation, further enhancing breathability.
hiddenso.com- Chafing reduction
Split design reduces inner-thigh chafing by minimizing fabric contact.
Why this is supported
The split breaks the hem circumference, so fabric does not rub continuously against the inner thigh.
The split design minimizes the amount of fabric rubbing against the inner thigh, a common source of chafing, especially during long runs or in humid conditions.
hiddenso.com- Mobility
Side slit allows panels to separate freely, enabling full stride and deep squat mobility.
Why this is supported
By breaking the hem circumference, the front and back panels separate freely during hip flexion, preventing the short from pulling at the back of the leg.
The key characteristic is the side split on the running shorts. This design can effectively reduce fabric restriction, allowing for greater strides and larger freedom of leg movement.
goaluniform.comFor other movements like squats and lunges, the slit prevents bunching at the hip crease, making the short suitable for more than just running.
Side slits are one of those details that look purely stylistic at first glance, but from a performance standpoint they are doing serious heavy lifting.
kawasaki-sports.com- Odor control longevity
Polygiene treatment is permanent and survives repeated washing.
Why this is supported
The merchant's Q&A section states the treatment's lifetime permanence:
Polygiene odor control is a permanent treatment that bonds to the fabric at the molecular level and lasts the lifetime of the garment, even after repeated washing.
How long does the Polygiene odor control last? Is it permanent or does it wash out over time?- Travel advantage
Two pairs can last a week of workouts, reducing luggage.
Why this is supported
The permanent odor control makes these shorts ideal for travel. An outdoor gear site notes:
If you are away on a long trip, you can take fewer items with you.
advnture.comThis means two pairs can cover a week of workouts without washing, validating the travel perk.
- Price advantage
At 59 CAD (43 USD), it undercuts Tracksmith's $70 Twilight Shorts by 39%.
Why this is supported
The I.FIV5 Split-Hem Short is priced at 59 CAD (roughly 43 USD), while the Tracksmith Twilight Split Shorts retail at $70 USD.
$70
tracksmith.comThe brand is a Simons Canada-exclusive, avoiding import markups, saving Canadian buyers over 35% compared to imported Polygiene shorts.
i. FiV5 by Simons: an exclusive designed in Canada
lyst.comThe permanent Polygiene treatment enables extended wear between washes, reducing cost-per-wear for travelers.
If you are away on a long trip, you can take fewer items with you.
advnture.comThe I.FIV5 shorts at 59 CAD compete with the Tracksmith Twilight Split Shorts at
and the Athleta Mesh Racer Run Short at
$55.00
athleta.gap.com. Unlike these, the I.FIV5 includes a
Built-in micro-perforated bike short with patch pockets
lyst.comfor phone storage, while the Athleta is limited to a single zip pocket as described:
2 POCKETS: 1 secure zip pocket, 1 hidden key envelope pocket
athleta.gap.com. The combination of a lower price and more functional storage yields a value advantage of over 35% for Canadian buyers.
Comparative analysis shows this price undercuts most competitors. One source states:
making it one of the least expensive ways to get Polygiene-treated split shorts on the market
How the price compares to similar performance shorts — polygiene_at_a_sub_45_usd_priceAdditionally, Canadian buyers avoid the import markup that other brands incur.
- Feature set
Phone pocket, adjustable waist, and split-hem add value typically missing from shorts at this price.
Why this is supported
The built-in bike short includes patch pockets that can hold a phone, a feature absent from similarly priced shorts like Athleta Mesh Racer Run Short and Tracksmith Twilight.
Built-in micro-perforated bike short with patch pockets
lyst.comThe sliding barrel cord lock allows one-handed adjustment and stays locked during movement:
the internal spring clamp grips the cord firmly so the fit stays locked during running, burpees, or box jumps
Adjustable toggle waist fit and durability — sliding_barrel_closureThe side-split hem reduces fabric restriction, enabling greater leg freedom:
This design can effectively reduce fabric restriction, allowing for greater strides and larger freedom of leg movement.
goaluniform.com- Recycled fabric
Recycled polyester outer cuts CO₂ emissions 30–60% vs virgin polyester without performance loss.
Why this is supported
The outer shorts fabric uses recycled polyester that performs identically to virgin material, offering
the same core strengths: high durability, strong color retention, quick-drying behavior, and resistance to wrinkles and shrinkage
kawasaki-sports.comMoreover, production significantly reduces environmental impact:
Recycled polyester (rPET) uses 45–85% less energy and produces 30–60% fewer CO₂ emissions than virgin polyester
natuclothes.com- Phone pocket
Built-in bike short pocket fits a cell phone and stays secure during exercise.
Why this is supported
The built-in bike short includes a patch pocket purpose-designed for phone storage. The brand states that
The built-in bike short has a patch pocket specifically designed to hold a cell phone.
How large are the patch pockets on the built-in shorts? Can they securely hold a phone during exercise?, and the product listing confirms a
Built-in micro-perforated bike short with patch pockets
lyst.com. This pocket design eliminates the need for a separate belt or armband. In comparison, competing shorts like the Athleta Mesh Racer Run Short ($55 USD) offer only a zip pocket and a key envelope, making this short a better value for phone-carrying runners (59 CAD ≈ $43 USD). The brand recommends testing with your phone model for fit.
- Waistband
High-rise waistband with adjustable toggle and locking cord holds the shorts securely when a phone is in the pocket.
Why this is supported
The waistband uses a high-rise design that sits above the hip bones, with an adjustable toggle that cinches snugly. A sliding barrel cord lock maintains tension during running and burpees, preventing the shorts—and the phone pocket attached to the inner short—from shifting or loosening. This anchoring effect prevents the pull-down common with mid-rise shorts when a phone is stored.
- Discretion
Phone remains hidden from view under the loose outer split-hem layer.
Why this is supported
The outer shorts are designed as a loose layer over the inner short. The description states that
The outer shorts are made from a lightweight, stretch recycled polyester fabric that offers a relaxed, loose fit.
Is the fabric compressive or loose-fitting? What is the fabric weight (e.g., lightweight, medium)? Is it sheer when stretched?, and the inner short is described as having
Built-in micro-perforated bike short with patch pockets
lyst.com. This layering means a phone stored in the inner pocket is concealed under the outer fabric, keeping it out of sight.
- Breathability
Micro-perforated liner vents across entire leg, reducing clamminess.
Why this is supported
The liner’s micro-perforations are a technical detail borrowed from high-end cycling gear, proven to increase breathability. For example,
INSERT3D waffle: A patented, three-layer perforated foam that increases breathability and eliminates excess weight.
assos.comThe full-leg liner distributes this ventilation across the entire leg, not just the crotch area, equalizing airflow to hips, thighs, and seat during running and HIIT. The micro-perforated knit structure creates thousands of tiny pores that actively circulate air, which
increases airflow and ventilation
m.faybric.comand prevents clammy buildup. Additionally, despite the compressive fit (89% nylon, 11% spandex), the liner maintains breathability, as it is
made from micro-perforated microfibre, which provides a snug, compressive layer
Is the fabric compressive or loose-fitting? What is the fabric weight (e.g., lightweight, medium)? Is it sheer when stretched?- Fabric sustainability
Recycled polyester from PET bottles cuts CO₂ emissions by 30–60%.
Why this is supported
The outer shorts are made from recycled polyester. According to research,
Approximately 98% of recycled polyester is made from post-consumer PET plastic bottles
natuclothes.com. This means that producing the fabric directly diverts plastic from landfills. Furthermore,
Recycled polyester (rPET) uses 45–85% less energy and produces 30–60% fewer CO₂ emissions than virgin polyester
natuclothes.com, giving the fabric a substantially lower manufacturing footprint.
- Performance parity
Same durability, quick-dry, and wicking as virgin polyester.
Why this is supported
Despite being made from recycled materials, the fabric's performance is not compromised.
the resulting fabric retains the same high durability, quick-drying behavior, and moisture-wicking properties that define quality activewear
Recycled polyester fabric feel and performance — performance_parityThis means that the shorts will perform like any high-quality activewear.
- Brand exclusivity
I.FIV5 is a Simons private-label exclusive designed in Canada.
Why this is supported
The source material confirms the I.FIV5 is
i. FiV5 by Simons: an exclusive designed in Canada
lyst.com. This private-label model, without the distribution overhead of imported US brands, allows for competitive features like Polygiene and a phone-ready liner at a CAD price that undercuts US alternatives.
- Layering
Outer shorts fit loosely over a compressive inner liner, and the outer fabric is opaque when stretched and quick-drying.
Why this is supported
The seller's QA confirms the layering design:
The outer shorts are made from a lightweight, stretch recycled polyester fabric that offers a relaxed, loose fit. The built-in bike short is made from micro-perforated microfibre, which provides a snug, compressive layer.
Is the fabric compressive or loose-fitting? What is the fabric weight (e.g., lightweight, medium)? Is it sheer when stretched?The outer fabric also remains opaque when stretched:
The fabric is lightweight and not sheer when stretched.
Is the fabric compressive or loose-fitting? What is the fabric weight (e.g., lightweight, medium)? Is it sheer when stretched?And it is quick-drying, matching the performance of virgin polyester:
From an engineering standpoint, that means virgin and recycled polyester begin with the same core strengths: high durability, strong color retention, quick-drying behavior, and resistance to wrinkles and shrinkage
kawasaki-sports.com- Side splits
Side slits reduce chafing and allow full range of motion for runs, squats, and lateral movements.
Why this is supported
The side split design reduces friction and improves mobility:
The split design minimizes the amount of fabric rubbing against the inner thigh, a common source of chafing, especially during long runs or in humid conditions.
hiddenso.comIt also allows greater freedom of movement:
The key characteristic is the side split on the running shorts. This design can effectively reduce fabric restriction, allowing for greater strides and larger freedom of leg movement.
goaluniform.comThis is confirmed to be beneficial for runs, squats, and lateral moves:
When you are pushing hard on a long run, dropping into a deep squat, or swinging a leg over a dirt bike, tiny design details decide whether your gear works with you or against you. Side slits are one of those details that look purely stylistic at first glance, but from a performance standpoint they are doing serious heavy lifting.
kawasaki-sports.com- Inner liner
The micro-perforated inner liner provides ventilation and includes a phone pocket secure enough for exercise.
Why this is supported
The inner liner uses micro-perforated fabric for breathability:
Enhanced Breathability – Micro-perforated structure increases airflow and ventilation.
m.faybric.comThis ventilation is distributed across the whole leg to prevent heat buildup. Additionally, the liner has a phone pocket:
Image Analysis
3 images- 01
Product
A pair of black sport shorts with an outer loose split hem layer over a fitted inner short and an elastic waistband with drawstring, shown on a model lying on a rock surface.
- Outer split-hem layerLoose outer short layer with a curved split hem that overlaps the inner short and drapes over the upper thighs on both sides.
1 region
x 0.18 · y 0.58 · w 0.64 · h 0.26 (high) - Inner fitted shortFitted inner compression-style short visible under the outer layer, covering the upper thigh and extending below the outer hem on the right leg.
1 region
x 0.44 · y 0.68 · w 0.34 · h 0.22 (high) - Elastic waistband and drawstringHigh, gathered elastic waistband with a visible tied drawstring at center front set into the waist channel.
1 region
x 0.24 · y 0.50 · w 0.52 · h 0.12 (high) - Fabric finishOuter and inner fabrics appear matte with a smooth texture consistent with lightweight activewear materials.
- Visible absence of printed brandingNo visible logos, printed text, or brand marks on the visible portions of the shorts.
1 region
x 0.18 · y 0.50 · w 0.64 · h 0.34 (medium)
Other
Lifestyle studio or outdoor shot showing a model lying on a textured rock surface with dappled sunlight; styling includes a cropped brown top, white bandana, and sunglasses.
- Model poseModel is lying on back with left arm bent behind head and right hand lightly lifting the hem of the top, exposing the waist and shorts.
1 region
x 0.08 · y 0.02 · w 0.84 · h 0.96 (medium) - Styling accessoriesWhite bandana tied over the head and small oval dark sunglasses worn by the model.
1 region
x 0.28 · y 0.06 · w 0.32 · h 0.17 (high) - Top visibleCropped short-sleeve top in a medium brown color that sits above the waistband of the shorts.
1 region
x 0.18 · y 0.20 · w 0.64 · h 0.34 (high) - Background surfaceTextured natural rock surface with moss and small vegetation patches to the right side of the frame.
1 region
x 0.02 · y 0.04 · w 0.96 · h 0.92 (high) - Lighting and shadowDirectional sunlight creating dappled shadows from overhead foliage across the model and background, producing high-contrast areas.
Colors
black· outer short layer#312E34black· inner compression short#312E33black· waistband and drawstring#322D33- Outer split-hem layerLoose outer short layer with a curved split hem that overlaps the inner short and drapes over the upper thighs on both sides.
- 02
Product
Rear view of a pair of short athletic shorts on a model showing an elastic gathered high waistband, rear yoke seam, and a curved split hem with a small square logo at the lower right hem.
- WaistbandWide elastic waistband with multiple gathered stitched rows creating a ruched appearance across the top rear of the shorts.
1 region
x 0.20 · y 0.06 · w 0.60 · h 0.10 (high) - Rear yoke seamHorizontal seam across the upper rear of the shorts forming a yoke that separates the waistband from the lower body of the shorts.
1 region
x 0.14 · y 0.16 · w 0.72 · h 0.06 (high) - Body fabricSmooth, matte lightweight woven fabric with a soft drape and minimal visible texture covering the short panels.
1 region
x 0.12 · y 0.12 · w 0.76 · h 0.38 (high) - Split hem shapeCurved short legs with a slight outward flare at the side seams and a low side split at the hem creating a rounded silhouette.
1 region
x 0.12 · y 0.32 · w 0.76 · h 0.18 (high) - Hem bindingNarrow folded hem with topstitching visible along the lower edge of the shorts.
1 region
x 0.14 · y 0.40 · w 0.72 · h 0.06 (high) - Lower-right hem logoSmall square logo patch or print located near the outer lower-right hem of the shorts.
1 region
x 0.67 · y 0.34 · w 0.04 · h 0.04 (high)
Other
Studio product shot showing a model from the rear against a neutral light gray background with visible legs, white crew socks, and mauve athletic shoes; soft shadow beneath feet and even diffuse lighting.
- Shot compositionFull-body lower rear shot cropped roughly at the model's waist and just below the shoes, centered horizontally.
- BackgroundSmooth uniform light gray studio background without visible texture or props.
- Model and propsModel wearing white mid-calf socks and mauve running shoes visible below the shorts; these items are props and not part of the product.
1 region
x 0.20 · y 0.62 · w 0.60 · h 0.34 (high) - Lighting and shadowEven diffuse studio lighting with a soft shadow on the floor under the model's feet and faint specular highlights on the fabric folds.
Colors
black· shorts main fabric#1E191Cwhite· lower-right hem logo- WaistbandWide elastic waistband with multiple gathered stitched rows creating a ruched appearance across the top rear of the shorts.
- 03
Product
Black athletic shorts with an elastic gathered waistband, short split hem at the side, and a slightly curved front hem; lightweight matte fabric visible.
- Overall silhouetteMid-rise athletic shorts with a relaxed, slightly flared short-length silhouette and a gently curved front hem.
1 region
x 0.22 · y 0.56 · w 0.56 · h 0.29 (high) - WaistbandWide elastic gathered waistband with visible elastic ruching across the front; a short thin drawcord loop is visible at the center front top of the waistband.
1 region
x 0.33 · y 0.52 · w 0.34 · h 0.11 (high) - Side split hemSmall side split at the outer thigh hem creating a short vent where the front and back hem panels separate.
2 regions
x 0.24 · y 0.72 · w 0.10 · h 0.10 (high); x 0.66 · y 0.72 · w 0.10 · h 0.10 (high) - Fabric appearanceLightweight woven fabric with a smooth, matte finish and slight drape producing soft folds at the front leg panels.
1 region
x 0.30 · y 0.60 · w 0.40 · h 0.20 (high) - Seam detailsVisible center-front seam and vertical side seams; hem is narrow and topstitched.
1 region
x 0.38 · y 0.60 · w 0.24 · h 0.20 (medium)
Other
Image shows a model wearing additional garments and accessories against a plain light background; even studio lighting with soft shadows.
- Model stylingFemale model wearing a mauve sports bra and a burgundy sweatshirt draped over the shoulders while holding a red padded bag in her right hand.
1 region
x 0.06 · y 0.00 · w 0.88 · h 0.56 (high) - AccessoriesRed padded bag with bright strap and a white zipper pull is held at the model's right hip; model also wears a red headband and dark sunglasses.
2 regions
x 0.67 · y 0.64 · w 0.26 · h 0.25 (high); x 0.34 · y 0.00 · w 0.36 · h 0.20 (high) - Background and lightingPlain light gray background with soft, diffuse studio lighting and minimal shadowing under the model.
- Image crop and framingFramed from slightly above mid-thigh to top of head, cropping the lower legs and most of the left forearm.
Colors
black· main body (shorts)#161113- Overall silhouetteMid-rise athletic shorts with a relaxed, slightly flared short-length silhouette and a gently curved front hem.
Documents & Data
Customer Reviews
2 total2 reviews · out of 5
Parfait pour le sport.
Très confortable
Short pour la course
Belle couleur, rapport prix/qualité excellent. J’ai la camisole de la même couleur. Pris grandeur moyen car je me trouve plus confortable ainsi même si la grandeur Small aurait été Ok.