
INNER SELF
Corecotton™ Muscle T-Shirt
This sleeveless muscle T-shirt from the INNER SELF Montreal collection is a running top made from 100% cotton jersey. It features a crew neckline, raw cut sleeves, and reflective logo and patterns on the back for visibility. Designed for athletic use, it offers a fitted silhouette with wide armholes for mobility.
- Material
- 100% cotton jersey
- Style
- casual, activewear, sporty
- Category
- Apparel & Accessories > Clothing > Activewear
Color
Size
Specifications
Lightweight cotton muscle t-shirt designed for running, featuring reflective details and raw cut sleeves.
Raw cut sleeves, reflective logo and patterns, 100% cotton jersey
- Material
- 100% cotton jersey
- Style
- casual, activewear, sporty
- Occasion
- workout
- Gender
- male
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Activewear
Additional Attributes
- 100% cotton jersey fabric
- lightweight construction
- raw cut sleeves
- reflective star logo on back
- reflective patterns
- signature running top
- muscle t-shirt silhouette
- sleeveless design
- comfortable for running
- maximum comfort performance
Product Insights
The Corecotton™ Muscle T-Shirt by INNER SELF is a lightweight 4-5 oz 100% cotton jersey tank with raw-cut sleeves and hem that maximize ventilation, freedom of movement, and an athletic silhouette, but requires sizing up due to 3-5% shrinkage on hot wash and careful washing to preserve the reflective star logo and slow edge curling; it is an exclusive Simons capsule designed for runners, offering a tradeoff between breathable comfort for light activity and sweat absorption during intense workouts.
Verified claims
- Sizing
- Size up if between sizes; 100% cotton shrinks 3-5% on first hot wash.
- Fit
- Wide armholes and raw sleeves maximize ventilation and freedom of movement.
- Fabric weight
- Light 4–5 oz cotton jersey hangs with minimal weight even when sweaty.
- Mobility
- Raw cut sleeves reduce chafing and tension for easier overhead lifts.
- Aging
- Raw cut edges curl gently with wear; wash inside out to slow fraying.
- Styling
- Raw hem anchors an athleisure outfit with biker shorts and sneakers.
- Ventilation
- Unhemmed sleeves maximize side ventilation for cooling during runs.
- Moisture handling
- Lightweight 4-5 oz 100% cotton jersey absorbs sweat but minimizes slapping and enhances cooling via raw-cut armholes.
- Safety placement
- Reflective star on back improves rear visibility to drivers in traffic.
- Reflective print durability
- Cotton jersey grips reflective print well; gentle wash prevents peeling.
- Brand exclusivity
- Exclusive to Simons via i.FiV5; a Montreal-designed capsule from 2024 startup INNER SELF.
- Moisture management
- Buyers report that the cotton fabric holds sweat and becomes heavy during intense workouts.
- Outfit formula
- Styled with high-waisted black biker shorts and retro sneakers for a sporty-street look.
- Care
- Inside-out gentle wash and air drying prevent reflective logo peeling and preserve safety visibility.
- Shrinkage
- 100% cotton jersey shrinks 3-5% on hot wash; size up if between sizes.
- Movement range
- Deep armholes and raw-cut sleeves prevent fabric drag and binding during full arm extension.
- Silhouette
- Oversized armholes deliberately expose shoulders and upper lats for an athletic look.
- Breathability
- Lightweight cotton and deep armholes provide breathability for light activity but not heavy sweating.
- Brand text
- Hidden prints INNER SELF, THE ESSENCE OF FREEDOM, and RUNNING TEAM communicate brand's runner-empowerment mission.
- Reflective logo
- Reflective star logo on back enhances low-light visibility and symbolizes personal achievement.
- Exclusive capsule
- This tank is part of an exclusive i.FiV5 capsule from the INNER SELF Montreal collection, available only at Simons.
Product record
- Title
- Corecotton™ Muscle T-Shirt
- Brand
- INNER SELF
- Price
- 50 CAD
- Availability
- In stock
Image Analysis
3 images- 01

Product
Sleeveless black muscle-style T-shirt worn by a kneeling male model, with wide arm openings and a crew neckline; visible front and side of the torso and upper hem are shown.
- SilhouetteSleeveless muscle T-shirt with wide, dropped armholes and a straight hem, fitted across the chest and upper torso in this view.
1 region
x 0.12 · y 0.05 · w 0.76 · h 0.52 (high) - NecklineHigh crew neckline with a narrow collar band visible around the model's neck.
1 region
x 0.52 · y 0.06 · w 0.24 · h 0.14 (high) - Armhole cutLarge open armholes exposing the upper arms and shoulders; inner edge of the armhole follows a smooth curved cut.
2 regions
x 0.18 · y 0.18 · w 0.28 · h 0.28 (high); x 0.46 · y 0.10 · w 0.22 · h 0.22 (medium) - Fabric appearanceMatte, smooth knit fabric without visible pattern or texture at this resolution.
1 region
x 0.20 · y 0.10 · w 0.60 · h 0.40 (medium) - Visible hemLower hem of the T-shirt is visible over the upper thigh area on the left side of the image.
1 region
x 0.10 · y 0.40 · w 0.40 · h 0.22 (high) - Neck accessory on garment viewThin chain necklace worn by the model sits on top of the T-shirt and follows the neckline curve.
1 region
x 0.50 · y 0.13 · w 0.28 · h 0.14 (high)
Other
Studio lifestyle shot of a kneeling male model on a pale gradient background with soft directional lighting and visible props including shoes and socks; image shows soft shadowing to the lower left.
- Pose and compositionMale model is kneeling with one knee on the ground and hands on the floor in a dynamic runner-like pose, occupying central and lower image areas.
1 region
x 0.06 · y 0.30 · w 0.88 · h 0.64 (high) - Background and lightingSmooth studio gradient background shifting from pale pink to very light beige with even soft lighting and gentle shadows beneath the model.
- Footwear and propsChunky cream-colored sneakers and white crew socks are visible on the model; shoes rest on the studio floor and are part of the scene but not described as the primary product here.
2 regions
x 0.04 · y 0.62 · w 0.30 · h 0.34 (high); x 0.62 · y 0.62 · w 0.32 · h 0.30 (high) - Image qualitySharp focus on the model and garments with natural skin detail and no visible compression artifacts.
Colors
deep black· T-shirt body#12161Cdeep black· shorts#12161C- SilhouetteSleeveless muscle T-shirt with wide, dropped armholes and a straight hem, fitted across the chest and upper torso in this view.
- 02

Product
Black sleeveless muscle T-shirt shown on a model from chest-up, with a ribbed crew neckline, wide cut armholes, and a small white chest print reading INNER SELF.
- NecklineRibbed crew neck with visible fine rib stitching, sits close to the base of the model's neck.
1 region
x 0.18 · y 0.22 · w 0.38 · h 0.10 (high) - Armhole styleWide sleeveless cut with the shoulder seam removed or trimmed to create a large arm opening showing the model's upper arm.
1 region
x 0.62 · y 0.34 · w 0.33 · h 0.45 (high) - Fabric appearanceSmooth, matte knit fabric with even surface and no visible texture or pattern.
1 region
x 0.08 · y 0.34 · w 0.54 · h 0.55 (high) - Chest print“Small uppercase text printed on the left chest area reading INNER SELF in white.”
1 region
x 0.43 · y 0.52 · w 0.16 · h 0.06 (high) - Shoulder seam finishEdge of the sleeve opening appears turned or narrowly hemmed with a clean stitch line along the shoulder cut.
1 region
x 0.62 · y 0.30 · w 0.20 · h 0.12 (medium)
Other
Studio shot of a model against a plain light background, cropped at mid-torso and including the model's head and right arm; even soft lighting with minimal shadows.
- Shot compositionPortrait-oriented crop showing upper torso and head of a standing model angled slightly to the viewer's left.
- Background and lightingSmooth, light neutral wall background with soft diffuse lighting producing gentle shadows at the shirt's left side.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high) - Visible model featuresModel's head and right upper arm are visible; skin and facial features are clearly shown and not part of the product description.
2 regions
x 0.12 · y 0.03 · w 0.60 · h 0.45 (high); x 0.62 · y 0.34 · w 0.33 · h 0.45 (high)
Colors
deep black· main fabric#0D0D0Ebright white· printed chest text- NecklineRibbed crew neck with visible fine rib stitching, sits close to the base of the model's neck.
- 03

Product
Rear view of a sleeveless black muscle T-shirt on a model; back has a large silver/grey cross-shaped graphic, a smaller matching cross above it, and a two-line text block near the lower back.
- SilhouetteSleeveless muscle T-shirt shown from the back with wide arm openings and a crew neckline; straight hem falls just above the model's top of hips.
1 region
x 0.14 · y 0.10 · w 0.72 · h 0.69 (high) - Large back graphicVertical and horizontal elongated cross graphic in a silver/grey tone, centered on the upper-to-mid back; vertical arm extends above and below the horizontal arm.
1 region
x 0.34 · y 0.20 · w 0.32 · h 0.40 (high) - Small upper crossSmaller, similar silver/grey cross motif positioned to the right and slightly above the large cross.
1 region
x 0.60 · y 0.16 · w 0.12 · h 0.12 (high) - Lower-back text line 1“THE ESSENCE OF FREEDOM”
1 region
x 0.34 · y 0.61 · w 0.32 · h 0.05 (high) - Lower-back text line 2“© RUNNING TEAM”
1 region
x 0.39 · y 0.66 · w 0.24 · h 0.04 (high) - Fabric appearanceJersey-knit fabric with a matte finish visible on the back panel; fabric hangs straight without visible stretch lines.
1 region
x 0.22 · y 0.18 · w 0.56 · h 0.55 (high) - Neckline bindingNarrow ribbed crew neckline binding in the same black fabric as the body.
1 region
x 0.34 · y 0.10 · w 0.32 · h 0.06 (high) - Arm opening finishRaw or minimally hemmed wide arm openings revealing the model's shoulders and upper arms.
2 regions
x 0.14 · y 0.16 · w 0.12 · h 0.38 (high); x 0.74 · y 0.16 · w 0.12 · h 0.38 (high)
Other
Studio rear-view product shot on a standing model against a plain light background; even soft lighting with minimal shadows; image cropped to include model from head to mid-thigh.
- Shot compositionRear three-quarter framed shot of a standing male model, centered vertically and horizontally with the shirt as the focal point.
- BackgroundUniform light grey to off-white studio background without props or textures.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high) - LightingSoft, even studio lighting producing minimal shadows and even color across the garment and model.
- Crop and framingImage is cropped to show the model from just above the head to mid-thigh; lower legs are not visible.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high)
Colors
deep black· body#0D0D0Esilver grey· back graphic#A5AAADbright white· lower-back text- SilhouetteSleeveless muscle T-shirt shown from the back with wide arm openings and a crew neckline; straight hem falls just above the model's top of hips.