
Le 31
Flat-Ribbed Jersey T-Shirt Muscle Fit
This Le 31 by Simons long-sleeve T-shirt is a muscle-fit top made from stretch ribbed jersey in an organic cotton blend. It has a crew neckline, fitted set-in sleeves extending to the wrists, and a straight hem, with vertical flat-rib knit texture on the front and back. It is designed in Canada as an exclusive and is shown in black.
- Material
- Stretch ribbed jersey in an organic cotton blend
- Gender
- male
- Style
- casual, slim-fit
- Category
- Apparel & Accessories > Clothing > Shirts & Tops
Specifications
Long-sleeve muscle-fit T-shirt in stretch flat-ribbed jersey made from an organic cotton blend, exclusively designed in Canada by Le 31 by Simons.
Muscle fit, long sleeves, stretch flat-ribbed jersey, organic cotton blend, exclusive Le 31 by Simons design.
- Material
- Stretch ribbed jersey in an organic cotton blend
- Style
- casual, slim-fit
- Occasion
- everyday, casual
- Gender
- male
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Shirts & Tops
Additional Attributes
- Muscle fit
- Long sleeves
- Flat-ribbed jersey fabric
- Stretch ribbed jersey
- Organic cotton blend
- T-shirt silhouette
- Pullover construction
- Exclusive Le 31 by Simons design
- Designed in Canada
- Close-fitting through chest and arms
Product Insights
Long-sleeve muscle-fit top despite the T-shirt name; a separate Le 31 ribbed muscle-fit tee has shortened sleeves. Muscle fit is close through chest and shoulders, tapering to the waist; size up if you are at the top of a size band or prefer a looser drape. 70% organic cotton, 25% polyester, 5% spandex. Rib knit is thicker and warmer for the same yarn than plain jersey, with better recovery from stretch. Machine wash, do not bleach, tumble dry, iron with or without steam. Every purchasable combination is 50 CAD and in stock; there is no price or availability argument for one color or size over another.
Verified claims
- Product type
- Long-sleeve muscle-fit top despite the T-shirt name; a separate Le 31 ribbed muscle-fit tee has shortened sleeves.
- Fit
- Muscle fit is close through chest and shoulders, tapering to the waist; size up if you are at the top of a size band or prefer a looser drape.
- Sizing
- The sleeve-to-body seam should sit on the shoulders; if it sits near the collarbone or on the arm, size up.
- Sleeve articulation
- Muscle-fit sleeves sit slightly higher than slim-fit due to elasticity; long set-in sleeves follow the arm to the wrist with narrow cuffs.
- Comfort
- Muscle fit should feel close without binding; the fabric follows contours while arms move freely.
- Material
- 70% organic cotton, 25% polyester, 5% spandex.
- Rib behavior
- Rib knit is thicker and warmer for the same yarn than plain jersey, with better recovery from stretch.
- Rib structure
- A flat or wider rib repeat is flatter and more stable than a 1x1 rib, with less widthwise extension.
- Stretch/recovery
- 5% spandex supports stretch and recovery, but higher Lycra does not necessarily improve stretch for every knit, and plain knits can out-stretch rib knits.
- Care
- Machine wash, do not bleach, tumble dry, iron with or without steam.
- Shrinkage
- No pre-shrunk finish is listed for this style; other Le31 organic cotton jersey tees are pre-washed, and the polyester/spandex blend limits shrinkage compared with pure cotton.
- First wash
- Organic cotton refers to pesticide-free cultivation, not chemical-free finishing; textile studies found one wash removed detectable formaldehyde from tested garments.
- Construction
- Crew neck with narrow ribbed collar, set-in long sleeves, narrow cuffs, straight bottom hem, no visible logos or fasteners, and minimal seams.
- Colors
- Black, Grey, Off White, Grape/Dark Crimson; 19 variants offered.
- Color/size availability
- Black only starts at SMALL; Grey, Off White, and Grape/Dark Crimson include X-SMALL; 16 of 19 variants form an S/M/L/XL block identical across all four colors.
- Color story
- Grape/Dark Crimson is the only two-tone name; Black, Grey, and Off White are single-tone neutrals.
- Value
- Every purchasable combination is 50 CAD and in stock; there is no price or availability argument for one color or size over another.
- Layering
- As a long-sleeve base layer, it should fit close without binding, keep sleeves long enough to stay put, hold cuffs without rolling, and allow shoulder reach.
- Breathability
- The cotton-rich blend leans on cotton for comfort and breathability; it is not described as a technical moisture-management or quick-dry fabric.
- Durability
- Rib knit has better recovery from stretch than other single knits, and polyester adds resilience; knit research notes recovery can decrease over time.
Product record
- Title
- Flat-Ribbed Jersey T-Shirt Muscle Fit
- Brand
- Le 31
- Price
- 50 CAD
- Availability
- In stock
Buying Guide
1 comparison · 9 sourcesUses
Styled slightly tucked at the waist
In the product photos, this fitted long-sleeve tee is shown styled tucked slightly into the jeans at the front of the waistband. The partial tuck creates a small gathered fold at the waist, giving a relaxed, lived-in look with fitted bottoms.[2]
Product comparison
Compared within this brand.
| Flat-Ribbed Jersey T-Shirt Muscle Fit: Choose this if you want a long-sleeve, muscle-fit shirt that hugs the chest, arms, and torso with minimal drape: its stretch ribbed jersey of 70% organic cotton, 25% polyester, and 5% spandex has flat vertical ribs running continuously across the body and sleeves. It offers a crew neckline with a narrow ribbed collar and comes in Black, Grey, Off White, and Grape/Dark Crimson in sizes X-Small through X-Large, though Black is only listed in sizes Small to X-Large.[1,2,3,4] | Ribbed Jersey T-Shirt Muscle Fit: Choose this if you want a fitted muscle-fit tee with shortened sleeves that end above the elbow and a close-to-the-neck ribbed crew neckline. It's made of stretch organic cotton jersey (95% organic cotton, 5% spandex) with a visible vertical rib texture and a straight hem. It comes in colors including Black, Grey, Off White, Brown, Mossy Green, Indigo/Dark Blue, and Burgundy, in sizes from X-Small to X-Large; note the fit appears form-fitting on the model, which may not suit those preferring a looser cut.[5,6,7,8] | Soft Stretch Jersey T-Shirt Muscle Fit: Choose this if you want a muscle-fit crew-neck tee in soft, stretchy jersey (62% polyester made from recycled plastic bottles, 33% reprocessed cotton, 5% spandex) that reviewers describe as nicely weighted, not see-through, and holding up to frequent washing. Reviewers report a fitted-but-not-embarrassingly-snug cut with a length that suits a 6 feet 1 inch frame without riding up, and it comes in sizes X-SMALL through XX-LARGE and nine colors. Note that one reviewer found the XS runs a good size large and lacks taper, and an isolated report described a rubbery texture, so the hand feel may vary.[9] |
Image Analysis
3 images- 01

Product
Front view of a long-sleeve, flat-ribbed black jersey T-shirt worn by a model; visible features include vertical rib texture, crew neckline, fitted sleeves, and a tucked hem at the waist.
- Overall silhouetteLong-sleeve fitted T-shirt with a close-fitting torso and sleeves, worn tucked slightly into the model's waistband on the front right side.
1 region
x 0.15 · y 0.12 · w 0.70 · h 0.66 (high) - NecklineRound crew neckline with a narrow ribbed collar band that lies flat against the neck.
1 region
x 0.32 · y 0.09 · w 0.36 · h 0.12 (high) - Fabric textureVisible vertical flat-rib knit texture across the torso and sleeves forming narrow raised ribs.
1 region
x 0.20 · y 0.18 · w 0.60 · h 0.52 (high) - Sleeve constructionLong set-in sleeves that follow the arm contour and extend to the wrists with the rib texture continuing to the cuff area.
2 regions
x 0.14 · y 0.20 · w 0.18 · h 0.58 (high); x 0.66 · y 0.20 · w 0.19 · h 0.58 (high) - Hem detailLower front hem appears slightly tucked into the jeans on the model's left (image right) side, causing a small gathered fold at the waist.
1 region
x 0.40 · y 0.66 · w 0.30 · h 0.16 (high) - Visible seamsShoulder and side seams are present but minimal; no external fasteners or visible logos on the shirt front.
Other
Studio product shot showing a model wearing the garment against a plain light grey/white background; additional visible items include sunglasses and blue denim jeans.
- Model and poseMale model shown from head to upper thighs, standing with left hand in pocket and right hand relaxed near the hip, head turned slightly to the left (image right).
1 region
x 0.10 · y 0.02 · w 0.80 · h 0.96 (high) - Accessories visibleSmall rectangular dark sunglasses with thin frames worn by the model.
1 region
x 0.43 · y 0.03 · w 0.20 · h 0.08 (high) - Other clothing visibleLight- to medium-wash blue denim jeans with visible belt loops and a front fly, worn with the T-shirt.
1 region
x 0.22 · y 0.72 · w 0.56 · h 0.26 (high) - Background and lightingEven, soft studio lighting on a plain light grey to white backdrop producing soft shadows and minimal directional contrast.
- Image crop and qualityClean product crop showing model centered vertically with slight space above head and lower edge cutting near mid-thigh; image is high resolution and sharp.
Colors
black· body and sleeves#0D0D0E- Overall silhouetteLong-sleeve fitted T-shirt with a close-fitting torso and sleeves, worn tucked slightly into the model's waistband on the front right side.
- 02

Product
Close-up view of the upper body wearing a fitted, long-sleeve, flat-ribbed jersey T-shirt in a black color; visible features include a crew neckline, vertical rib knit texture, and simple hemmed cuffs.
- NecklineRounded crew neckline with a narrow, slightly raised hem band in the same fabric and color as the shirt.
1 region
x 0.18 · y 0.18 · w 0.64 · h 0.14 (high) - Sleeve styleLong set-in sleeves fitted to the arm with a narrow hem at the wrist; sleeves follow the ribbed texture of the body.
2 regions
x 0.02 · y 0.44 · w 0.36 · h 0.48 (medium); x 0.62 · y 0.48 · w 0.36 · h 0.44 (medium) - Fabric textureFlat vertical ribs running continuously across the chest and sleeves, producing a fine linear striped texture.
1 region
x 0.14 · y 0.30 · w 0.72 · h 0.56 (high) - Fit and silhouetteFitted/muscle-fit silhouette across chest and upper arms with minimal drape; fabric sits close to the body.
1 region
x 0.10 · y 0.28 · w 0.80 · h 0.62 (medium) - Hem and stitchingNarrow, clean hem at sleeve cuff and neckline with no visible decorative stitching.
2 regions
x 0.56 · y 0.86 · w 0.36 · h 0.12 (medium); x 0.18 · y 0.18 · w 0.64 · h 0.08 (medium)
Other
Studio shot cropped at upper torso and head; white seamless background; model wearing sunglasses; soft lighting with subtle shadows; image is high resolution and well focused.
- Shot compositionTightly cropped studio portrait showing model from upper chest to top of head, arms crossed across the torso.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high) - BackgroundEven, bright white seamless background with no visible props or distractions.
- Lighting and shadowSoft studio lighting from above creating gentle highlights on the model's scalp and slight shadows under the chin and along the rib texture.
1 region
x 0.34 · y 0.02 · w 0.32 · h 0.12 (medium) - Accessory visibleRectangular black sunglasses with dark lenses worn by the model, partially covering the eyes.
1 region
x 0.22 · y 0.06 · w 0.56 · h 0.16 (high)
Colors
black· body and sleeves#0D0D0E- NecklineRounded crew neckline with a narrow, slightly raised hem band in the same fabric and color as the shirt.
- 03

Product
Rear view of a long-sleeve, flat-ribbed black jersey top worn by a model; visible ribbed texture, crew neckline, fitted sleeves and straight hem shown from the back.
- Silhouette and viewBack/rear view of a long-sleeve shirt fitted to the wearer, showing upper back, shoulders and full-length sleeves to the wrists.
1 region
x 0.12 · y 0.06 · w 0.76 · h 0.80 (high) - NecklineShallow crew neckline with a narrow binding visible along the back neck edge.
1 region
x 0.32 · y 0.05 · w 0.36 · h 0.06 (high) - Fabric textureFlat vertical ribbed knit texture running top-to-bottom across the entire visible back and sleeves.
1 region
x 0.20 · y 0.10 · w 0.60 · h 0.72 (high) - Sleeve constructionSet-in long sleeves that follow the arm contour and extend to the wrists with ribbed texture continuous from body to sleeve.
2 regions
x 0.12 · y 0.18 · w 0.30 · h 0.64 (high); x 0.58 · y 0.18 · w 0.34 · h 0.65 (high) - HemStraight bottom hem that sits over the top of the jeans with no visible side vents or decorative trim.
1 region
x 0.20 · y 0.72 · w 0.60 · h 0.14 (high) - Fit detailsShirt fits close to the body through the back and sleeves, showing body contours without visible looseness.
1 region
x 0.24 · y 0.12 · w 0.52 · h 0.64 (high)
Other
Studio shot showing a model from the rear against a plain light background; even soft lighting with subtle shadowing, crop includes model head to upper thighs.
- Background and stagingPlain light gray to white seamless background with no props or packaging visible.
- Model and cropMale model shown from the back with head turned slightly to the right; image crops at upper thighs so jeans pocket and hand are visible.
1 region
x 0.06 · y 0.00 · w 0.88 · h 0.96 (high) - Lighting and shadowSoft, even studio lighting with mild shadowing on the lower-left side of the shirt and a subtle highlight on the right shoulder and head.
1 region
x 0.18 · y 0.06 · w 0.64 · h 0.56 (medium) - Image qualitySharp focus on the garment and model; no visible motion blur or compression artifacts at this view size.
Colors
deep black· shirt body and sleeves#0C0C0E- Silhouette and viewBack/rear view of a long-sleeve shirt fitted to the wearer, showing upper back, shoulders and full-length sleeves to the wrists.
Variants
19 SKUs| SKU | Title | Price | Avail |
|---|---|---|---|
| 4709945 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Black - Small | CA$50.00 | Yes |
| 4709946 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Black - Medium | CA$50.00 | Yes |
| 4709947 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Black - Large | CA$50.00 | Yes |
| 4709948 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Black - X-Large | CA$50.00 | Yes |
| 4709949 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Grey - X-Small | CA$50.00 | Yes |
| 4709950 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Grey - Small | CA$50.00 | Yes |
| 4709951 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Grey - Medium | CA$50.00 | Yes |
| 4709952 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Grey - Large | CA$50.00 | Yes |
| 4709953 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Grey - X-Large | CA$50.00 | Yes |
| 4709954 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Off White - X-Small | CA$50.00 | Yes |
| 4709955 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Off White - Small | CA$50.00 | Yes |
| 4709956 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Off White - Medium | CA$50.00 | Yes |
| 4709957 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Off White - Large | CA$50.00 | Yes |
| 4709958 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Off White - X-Large | CA$50.00 | Yes |
| 4709959 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Grape/dark Crimson - X-Small | CA$50.00 | Yes |
| 4709960 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Grape/dark Crimson - Small | CA$50.00 | Yes |
| 4709961 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Grape/dark Crimson - Medium | CA$50.00 | Yes |
| 4709962 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Grape/dark Crimson - Large | CA$50.00 | Yes |
| 4709963 | Flat-Ribbed Jersey T-Shirt Muscle Fit - Grape/dark Crimson - X-Large | CA$50.00 | Yes |