I.FIV5
Ultra-Soft Muscle Tee
The Ultra-Soft Muscle Tee is a sleeveless crew-neck top from i.FiV5 by Simons' BALANCE collection, designed in Canada. It is made from ultra-soft stretch jersey using a recycled polyester blend, featuring Polygiene technology for odor control, inner armhole seams, and a relaxed silhouette with wide armholes and a straight hem. Suitable for yoga, training, and casual wear, the tee provides comfort and mobility with a matte black finish.
- Material
- Ultra-soft stretch jersey made from a recycled polyester blend
- Gender
- unisex
- Style
- athleisure, relaxed-fit, minimal
- Category
- Apparel & Accessories > Clothing > Activewear
Color
Size
Specifications
Ultra-soft muscle tee with relaxed fit, made from recycled polyester blend with odor-control technology.
Polygiene odor control, reflective logo, inner armhole seams
- Material
- Ultra-soft stretch jersey made from a recycled polyester blend
- Style
- athleisure, relaxed-fit, minimal
- Occasion
- yoga, workout, loungewear
- Gender
- unisex
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Activewear
Additional Attributes
- Amplified silhouette inspired by yogi clothing
- Ultra-soft stretch jersey from recycled polyester blend
- Polygiene odor control technology
- Inner armhole seams for comfort
- Reflective i.FiV5 logo for visibility
- Relaxed fit for ease of movement
Product Insights
The I.FIV5 Ultra-Soft Muscle Tee is a permanently bonded silver-salt-treated garment that inhibits odor-causing bacteria, allowing repeated wear after sweat sessions without washing. Made with recycled silver from electronic waste and Bluesign-approved, its 89% recycled polyester fabric wicks sweat for fast drying and a dry, soft feel. However, to maintain fit and odor control, users must avoid fabric softener, machine drying (which causes bagging), and instead air dry; the tee's size range tops out at XL. Inner armhole seams reduce curling and fraying compared to raw-cut armholes, offering a cleaner finish.
- Durability
Permanently bonded silver-salt treatment lasts the garment's life.
Why this is supported
The manufacturer states that the Polygiene silver-salt treatment is permanently bonded and integrated into the fibers, ensuring it lasts the garment's life without washing out:
Polygiene® treatment is permanently bonded to the fibers and is designed to last the life of the garment. It will not wash out over time, as the active silver salt technology is integrated into the fabric during manufacturing.
Does the Polygiene treatment last for the life of the garment, or does it wash out after a certain number of washes?- Odor control
Inhibits odor-causing bacteria, so you can wear the tee again after a sweaty session.
Why this is supported
The silver-salt treatment continuously inhibits odor-causing bacteria:
The bonded silver-salt Polygiene® treatment continuously inhibits the growth of odor-causing bacteria on the fabric, which means you can get through a sweaty session and still wear the tee without immediate washing
Softness and breathability of recycled polyester — polygiene_antibacterial_finishAdditionally, the fabric's low moisture absorption aids quick drying, further reducing odor:
rPET’s moisture absorption of just 0.4% means it does not wick perspiration into the fiber — instead, moisture travels through capillary action along the fiber surface
textiletuts.com- Care
Avoid fabric softener and air out after sweating to maintain Polygiene's effectiveness.
Why this is supported
Polygiene advises against fabric softeners because they coat fibers with nutrients that feed odor-causing bacteria:
We do not recommend using fabric softeners. This is because they provide an excellent source of nutrients for the bacteria that cause the stink.
polygiene.comAlso, leaving the tee damp in a bag after a workout can lead to mold and mildew, so it's best to air it out or wash promptly:
Keeping your workout clothing stuffed in your backpack or gym bag can cause mold or mildew to form and lead to nasty odors.
nike.comIf you can, avoid leaving your dirty gym clothes in a bag or laundry basket for any length of time and always wash them at the first opportunity.
polygiene.com- Certification
Bluesign-approved and made with recycled silver from electronic waste.
Why this is supported
The Polygiene treatment is Bluesign-approved, ensuring environmental safety:
Polygiene is Bluesign-approved, which means it meets stringent requirements for textiles claiming to be environmentally friendly and sustainable.
gearjunkie.comAdditionally, the silver chloride is recycled from electronic parts, reducing virgin material footprint:
The naturally occurring salt recycled from electronic parts is used by Polygiene as an anti-stink treatment for synthetic fibers.
gearjunkie.com- Moisture management
Sweat evaporates from the fabric surface, keeping the tee dry and soft.
Why this is supported
The recycled polyester in this tee has a moisture absorption of just 0.4%, meaning sweat does not soak into the fiber but instead travels along the surface and evaporates, keeping the wearer dry. One reviewer described it as
tissus très agréable pour le sport
Customer review, August 6, 2025, confirming the fabric feels pleasant during exercise. Additionally, the fibers dry extremely fast, going from wet to wearable in minutes, enhancing the dry sensation.
- Sustainability
Odor control technology uses recycled silver and holds Bluesign certification.
Why this is supported
The Polygiene treatment in this tee uses recycled silver chloride sourced from e-waste, avoiding virgin mining. It is also Bluesign certified:
Polygiene is Bluesign-approved, which means it meets stringent requirements for textiles claiming to be environmentally friendly and sustainable.
gearjunkie.com- Sizing
Size range ends at XL; no XXL or larger sizes.
Why this is supported
A customer review confirms that the tee's size options exclude XXL and beyond:
Tissu très doux. Dommage que la taille xxl ne soit pas offerte
Customer review, February 18, 2026This direct feedback demonstrates the unavailability of larger sizes.
- Armhole finish
Inner armhole seams give a cleaner finish than raw-cut armholes.
Why this is supported
The tee features inner armhole seams, which a product listing source notes as:
Inner armhole seams
lyst.comThis contrasts with the raw-cut armholes on other I.FIV5 tees, offering a more structured and polished arm opening.
- Fit preservation
Machine drying causes the tee to bag out; air drying preserves the shape.
Why this is supported
An informative source explains that dryer heat damages spandex:
Tumble dryers run at 50 to 70°C on low heat and 80 to 90°C on high heat. Either setting damages elastane.
freedomactivewear.com.auThis damage to the 11% spandex content causes the tee to bag out and lose its relaxed fit, so air drying is recommended to maintain shape.
- Washing practices
Cold wash, mesh bag, no softener preserve fit and odor control.
Why this is supported
Cold-water washing (30°C or below) prevents cumulative fiber weakening and elastane memory loss.
Anything over 30°C starts to weaken polyester fibres. At 40°C the elastane begins losing memory after 10 to 15 cycles.
freedomactivewear.com.auUsing a mesh laundry bag isolates the tee from snagging against zippers and rough fabrics, which is the primary cause of pilling.
What actually matters more is using a mesh laundry bag. A $6 mesh bag from Big W or Coles isolates each piece from contact with zips, hooks and rough fabrics in the load.
freedomactivewear.com.auFabric softener should be avoided because it coats fibers with a nutrient-rich residue that feeds odor-causing bacteria, overwhelming the Polygiene treatment.
We do not recommend using fabric softeners. This is because they provide an excellent source of nutrients for the bacteria that cause the stink.
polygiene.comAfter workouts, immediately air out or rinse the tee to prevent bacteria from multiplying in damp fabric.
Keeping your workout clothing stuffed in your backpack or gym bag can cause mold or mildew to form and lead to nasty odors.
nike.comThe Polygiene treatment is permanently bonded to the fibers and remains effective for the life of the garment when proper care is followed.
Polygiene® treatment is permanently bonded to the fibers and is designed to last the life of the garment. It will not wash out over time, as the active silver salt technology is integrated into the fabric during manufacturing.
Does the Polygiene treatment last for the life of the garment, or does it wash out after a certain number of washes?- Drying practices
Air drying prevents elastane damage and uses fast-drying fabric.
Why this is supported
Air drying is recommended because dryer temperatures (50–70°C on low, 80–90°C on high) exceed the 40°C threshold where elastane fibers undergo irreversible thermal degradation.
When exposed to temperatures above 40°C, these polymer chains begin to fragment — a process called thermal oxidative degradation.
textiletuts.comTumble dryers run at 50 to 70°C on low heat and 80 to 90°C on high heat, and either setting damages elastane.
Tumble dryers run at 50 to 70°C on low heat and 80 to 90°C on high heat. Either setting damages elastane.
freedomactivewear.com.auAdditionally, the recycled polyester fabric absorbs only 0.4% moisture, so it dries quickly on its own without a dryer.
rPET’s moisture absorption of just 0.4% means it does not wick perspiration into the fiber — instead, moisture travels through capillary action along the fiber surface, making it effective in tightly woven or knitted constructions designed specifically for moisture management.
textiletuts.com- Armhole seams
Inner armhole seams reduce curling and fraying over time.
Why this is supported
The inner armhole seams use a cleaner finish that reduces curling and fraying over time, maintaining a polished appearance through repeated wear and washing.
Inner armhole seams
lyst.com- Quick drying
89% recycled polyester's 0.4% moisture absorption ensures fast air drying.
Why this is supported
The recycled polyester in the tee has
moisture absorption of just 0.4%
textiletuts.com, meaning sweat stays on the fiber surface and evaporates rapidly, enabling faster air drying that saves energy.
- Construction
Inner armhole seams resist curling and fraying unlike raw-cut armholes.
Why this is supported
The product's description confirms
Inner armhole seams
lyst.com, in contrast to the
Raw-cut low armhole
lyst.comseen on the Faded Organic Cotton version. This structured finish resists curling and fraying over time, offering a cleaner, more polished look than the deliberately deconstructed raw-cut armholes.
Image Analysis
3 images- 01
Product
Front view of a black sleeveless muscle tee worn by a model; crew neckline and raw arm openings visible with a straight hem falling near the hips.
- Overall silhouetteSleeveless muscle tee shown on a model from the front with a straight, slightly relaxed fit through the torso and a hem that rests near the top of the hips.
1 region
x 0.18 · y 0.14 · w 0.64 · h 0.72 (high) - NecklineNarrow crew neckline with a visible ribbed band lying flat against the neck.
1 region
x 0.35 · y 0.12 · w 0.30 · h 0.08 (high) - Arm openingsWide sleeveless arm openings with fabric finishing that follows the shoulder line and exposes the upper arms.
2 regions
x 0.18 · y 0.16 · w 0.14 · h 0.28 (high); x 0.68 · y 0.16 · w 0.14 · h 0.28 (high) - Fabric appearanceSmooth knit fabric with a matte finish and no visible pattern or texture variations at this resolution.
1 region
x 0.30 · y 0.22 · w 0.40 · h 0.50 (medium) - Hem detailStraight hem with a single visible stitching line; hem falls over the top of the model's pants.
1 region
x 0.22 · y 0.74 · w 0.56 · h 0.12 (high) - Small side tagSmall rectangular fabric tag attached at the lower right side seam, tag detail not legible.Partial
1 region
x 0.69 · y 0.78 · w 0.04 · h 0.04 (medium)
Other
Studio shot of a male model against a plain light background, three-quarter view with model looking left and hands partially in pockets; soft even lighting and minimal shadows.
- Shot compositionCentered vertical composition showing the model from head to mid-thigh against a plain light gray to white background.
- Model poseModel faces forward with a slight turn of the head to the left, left hand in pocket and right hand hanging by the side.
2 regions
x 0.12 · y 0.64 · w 0.18 · h 0.28 (high); x 0.70 · y 0.64 · w 0.18 · h 0.28 (high) - Lighting and shadowEven soft studio lighting with subtle shadows visible along the sides of the torso and under the chin, no harsh highlights.
- Image cropImage is cropped just below mid-thigh and above the top of the head, leaving full view of the upper body and most of the arms.
Colors
matte black· body#0E0E0E- Overall silhouetteSleeveless muscle tee shown on a model from the front with a straight, slightly relaxed fit through the torso and a hem that rests near the top of the hips.
- 02
Product
Black sleeveless muscle tee shown from the back on a male model; smooth knit fabric with a crew-style neckline, wide armholes, visible shoulder seams, and a straight hem with topstitching.
- Overall silhouetteSleeveless straight-cut tank with full back coverage and a loose, relaxed fit over the torso.
1 region
x 0.12 · y 0.08 · w 0.64 · h 0.78 (high) - NecklineCrew-style neckline with narrow ribbed binding visible at the back neck edge.
1 region
x 0.28 · y 0.06 · w 0.28 · h 0.10 (high) - Armhole cutWide deep armholes with a clean finished edge exposing the upper arms and shoulder area.
2 regions
x 0.66 · y 0.17 · w 0.20 · h 0.36 (high); x 0.12 · y 0.16 · w 0.18 · h 0.40 (high) - Back panel and seamsSingle-piece back panel with visible shoulder seams; no center back seam or vents are visible.
1 region
x 0.18 · y 0.12 · w 0.48 · h 0.60 (high) - Hem finishStraight bottom hem with a visible narrow topstitch running parallel to the edge.
1 region
x 0.18 · y 0.72 · w 0.50 · h 0.12 (high) - Fabric appearanceSmooth, fine-knit fabric with a matte finish and minimal surface texture; slight horizontal compression marks visible across the back.
1 region
x 0.20 · y 0.20 · w 0.44 · h 0.48 (high) - Graphics or brandingNo visible logos, prints, or text on the visible back surface of the tee.
Other
Studio shot showing the garment on a male model against a plain light gray background with soft, even lighting; cropped above the knees and slightly angled to show the back and right profile of the model.
- Model presentationMale model standing with body turned slightly to the right, head turned further right showing a three-quarter profile; left arm mostly visible, right arm near side seam.
1 region
x 0.44 · y 0.00 · w 0.46 · h 0.86 (high) - Background and lightingUniform light gray studio background with soft, diffused lighting and minimal harsh shadows; gentle shadowing along the arm and under the hem.
- Supporting garment visibleOlive-green shorts visible at the lower portion of the frame, partially covered by the tee.
1 region
x 0.28 · y 0.78 · w 0.44 · h 0.20 (high) - Image crop and qualityHigh-resolution, well-lit image cropped to include the model from just above the head to mid-thigh; no motion blur.
Colors
matte black· main body#0E0E0E- Overall silhouetteSleeveless straight-cut tank with full back coverage and a loose, relaxed fit over the torso.
- 03
Product
Front view of a black sleeveless muscle tee worn by a model; visible features include a crew neckline, wide armholes, smooth knit fabric, and a straight hem falling to the hips.
- SilhouetteSleeveless tank/muscle tee with a straight vertical torso and relaxed fit on the model
1 region
x 0.24 · y 0.18 · w 0.52 · h 0.59 (high) - NecklineNarrow crew neckline with slightly raised binding that sits close to the base of the neck
1 region
x 0.37 · y 0.15 · w 0.26 · h 0.08 (high) - ArmholesWide sleeveless arm openings showing upper arms and shoulders, cut straight at the shoulder seam
2 regions
x 0.24 · y 0.18 · w 0.12 · h 0.20 (high); x 0.64 · y 0.20 · w 0.12 · h 0.20 (high) - Fabric appearanceSmooth, lightweight knit with a matte finish and soft drape; minimal visible texture
1 region
x 0.30 · y 0.28 · w 0.40 · h 0.45 (high) - HemStraight bottom hem that falls to the top of the model's trousers, with a small natural fold at the front
1 region
x 0.33 · y 0.62 · w 0.34 · h 0.10 (high)
Other
Studio lifestyle shot showing a model wearing additional garments and accessories against a light gray background; soft even lighting with minimal shadow.
- Model and stylingMale model wearing a dark baseball cap, an olive green sweatshirt draped over the shoulders, olive drawstring trousers, and carrying a black shoulder bag
1 region
x 0.08 · y 0.02 · w 0.84 · h 0.96 (medium) - CapCurved-brim baseball cap in a dark color pulled low on the forehead
1 region
x 0.27 · y 0.00 · w 0.28 · h 0.14 (high) - BagBlack fabric shoulder bag hanging at the model's right side with visible strap and soft collapsed shape
1 region
x 0.70 · y 0.44 · w 0.20 · h 0.36 (high) - Background and lightingPlain light gray studio background with soft even lighting and subtle shadowing along the model's left side
- Crop and framingImage framed from mid-thigh to slightly above the head, model slightly turned to the viewer's left
Colors
matte black· body#0E0E0E- SilhouetteSleeveless tank/muscle tee with a straight vertical torso and relaxed fit on the model
Documents & Data
Customer Reviews
6 total6 reviews · out of 5
belle qualité , douce
belle qualité , douce
Très confortable
Duoer
Parfait
Tissu très doux. Dommage que la taille xxl ne soit pas offerte
Parfait
Belle texture
parfait
tissus très agréable pour le sport
Très belle camisole
Confortable