
Le 31
Zip-Up Mock-Neck Sweater
This half-zip mock-neck sweater is a long-sleeve knit top from Le 31 by Simons, featuring a raised mock neck with a short center-front metal zipper, ribbed cuffs and hem, and a fitted silhouette. It is made from a silky blend of cotton and LENZING ECOVERO viscose with a fine, even knit texture. Designed in Canada, this sweater serves as a versatile layer for casual or everyday wear.
Color
Size
Specifications
- Material
- 40% LENZING™ ECOVERO™ viscose, 40% nylon made from recycled plastic, 20% cotton
- Gender
- male
- Age Group
- adult
- Condition
- new
Product Insights
The Le 31 Zip-Up Mock-Neck Sweater ($89, in stock) blends fashion and utility with a zip-adjustable neckline that transitions from crew to open collar, a structured silhouette that layers neatly, and six neutral-to-bold colorways for extended wear. Its directional stretch and recycled nylon resist sagging, while ECOVERO viscose (EU Ecolabel certified, closed-loop, 50% less carbon/water) wicks moisture, vents heat, and delivers a silky hand. The tradeoff: preserving fit and preventing pilling or shrinkage demands cold washing in a mesh bag, flat drying, folding, and avoiding sunlight—and care instructions are not in the listing, so buyers rely on the care label.
Verified claims
- Fit adaptation
- Directional stretch adapts fit; recycled nylon prevents sagging.
- Shape retention
- Proper care — mesh bag wash, flat dry, fold — maintains fit.
- Neckline
- Zip-up mock neck adjusts from crew to open collar.
- Moisture comfort
- ECOVERO viscose wicks moisture, reducing clammy feel.
- Softness
- The ECOVERO and recycled nylon blend provides a silky, smooth hand feel.
- Breathability
- The ECOVERO/cotton blend wicks moisture and vents heat; the zip prevents overheating.
- Care method
- Wash cold inside-out in a mesh bag; dry flat to preserve fit and prevent shrinkage.
- Color care
- Dry away from direct sunlight and store folded to prevent uneven fading.
- Care information
- Care instructions not provided in the listing; follow the care label for best results.
- Eco-credentials
- ECOVERO viscose is EU Ecolabel certified and closed-loop (50% less carbon/water), plus recycled nylon for dual eco-credentials.
- Color longevity
- Six neutral and trend colors encourage longer use, reducing replacement frequency.
- Care instructions
- Wash inside-out in a mesh bag to prevent pilling and tearing from wet viscose.
- Temperature regulation
- Zippered mock neck adjusts ventilation; breathable knit suits wide temperature range.
- Styling and fit
- Structured silhouette stays neat over layers; six colorways suit neutral or bold looks.
- Value
- At $89, it sits between fast-fashion knits and premium sustainable brands.
- Sustainability
- Dual eco-fibers with closed-loop production and EU Ecolabel.
- Fabric
- Silk-like hand, moisture wicking, breathable; requires cold wash and air-dry.
- Design
- Zip-up mock neck and six-color palette mix fashion and utility.
Product record
- Title
- Zip-Up Mock-Neck Sweater
- Brand
- Le 31
- Price
- 89 CAD
- Availability
- In stock
Deep Research
Sizing and fit for Le 31 sweaters
- The ribbed cuffs and hem introduce directional stretch that allows the sweater to comfortably adapt to your wrists and waist, giving a little extra room without distorting the silhouette — particularly beneficial if you're between sizes or want to wear it over a long-sleeve tee.
Keeping the sweater looking new
- Because viscose-based knits can stretch or sag when hung wet, laying flat to dry on a towel or mesh rack maintains the ribbed edging's structure and prevents the mock neck from losing its close-to-the-body silhouette.
- The 20% cotton content makes the sweater susceptible to dimensional shrinkage under heat; air-drying flat rather than machine drying will preserve the original fit and prevent the body from creeping shorter.
- Recycled nylon, while strong, can promote surface pilling when blended with shorter-staple cotton fibers; turning the sweater inside-out before washing minimizes abrasive friction against the knit face, which is the most effective single habit for keeping the silky finish smooth over time.
- The black colorway will fade with excessive sunlight exposure; drying indoors away from direct UV light and storing folded rather than on a hanger (which can expose stretched areas unevenly) will keep the depth of color even across the garment's lifespan.
- LENZING™ ECOVERO™ viscose, like conventional viscose, loses up to 50% of its tensile strength when wet, so washing this sweater in a mesh bag on a delicate cycle and avoiding wringing or twisting will prevent misshaping and tearing — especially critical given the 40% viscose content.
- To protect both the viscose's sheen and the dark black dye, wash in cold water (30°C max) with a detergent formulated for delicates or woolens, which lacks the enzymes and optical brighteners that can degrade cellulosic fibers and fade color over repeated cycles.
How it stacks up against the competition
- Priced at 89 CAD, this sweater occupies a deliberate 'accessible premium' tier — roughly twice the cost of a basic fast-fashion knit but well below the $150+ range of designer or higher-end sustainable labels, making it a tangible step-up piece that signals material consciousness without luxury sticker shock.
- Unlike many competitors who hang their sustainability claims on a single material (e.g., organic cotton or recycled polyester), this sweater utilizes two independently recognized eco-fibers — LENZING ECOVERO viscose from renewable wood sources and recycled nylon — doubling its environmental narrative and strengthening its appeal to a buyer who evaluates comprehensive material ethics.
- The zip-up mock neck introduces a technical, adjustable neckline that is more common in performance outerwear than in classic knitwear; it sets the sweater apart from the ubiquitous crewnecks and V-necks of most sustainable menswear collections, offering a style-first detail that adds visual structure and practical temperature control.
- Six colorways include fashion-forward options like Chocolate/Espresso and Mossy Green alongside standard Black and Navy — a palette depth that allows the sweater to function as a statement piece or a neutral layer, directly competing with curated essentials brands that emphasize 'slow fashion' color stories over seasonal trend dumps.
What LENZING™ ECOVERO™ brings to the sweater
- ECOVERO fibers have a smooth, round cross-section and are spun to a fine denier, creating a softer, silk-like hand compared to conventional viscose — at 40% of the knit, this directly produces the 'silky knit' feel that makes the sweater comfortable directly against the skin, even around the high mock neck.
- As a cellulosic fiber, ECOVERO viscose has a moisture regain of approximately 13%, significantly higher than nylon (4%) and cotton (8%), so the 40% viscose portion actively wicks perspiration away from the skin — reducing clamminess when worn indoors over a tee or during short outdoor commutes.
- Lenzing's ECOVERO manufacturing recovers and reuses over 99% of solvents and process water, cutting carbon emissions and water consumption by up to 50% compared to conventional viscose — so the sweater's environmental footprint is already notably lower than a standard viscose-blend knit, even before accounting for the recycled nylon content.
- Every batch of ECOVERO viscose carries EU Ecolabel certification, ensuring the fiber meets rigorous life-cycle standards for lower water use, reduced carbon emissions, and restricted chemical inputs — for this sweater, the 40% ECOVERO content means a substantial portion of the material is third-party verified as environmentally improved over generic viscose.
- ECOVERO's high absorbency allows it to release moisture vapour rapidly, combining with cotton's natural breathability to vent excess heat — in a zip-up mock neck, this ventilation prevents the sticky buildup that can occur with less breathable synthetic knits, making it wearable across a wider temperature range.
Image Analysis
3 images- 01

Product
Front view of a long-sleeve mock-neck zip sweater worn by a model; visible features include a short center front zipper with metal pull, ribbed cuffs and hem, and a smooth knit body in a dark color.
- Neck styleRaised mock-neck collar standing slightly open with the zipper partially unzipped to the upper chest, collar interior showing a contrasting lighter inner facing.
1 region
x 0.35 · y 0.12 · w 0.30 · h 0.10 (high) - Center zipperShort vertical center front zipper with a visible metal rectangular pull finished in a light metallic tone; zipper ends near mid-chest.
1 region
x 0.46 · y 0.17 · w 0.04 · h 0.06 (high) - Body materialSmooth, tightly knit fabric with a uniform matte surface and no visible pattern or texture variations across the torso.
1 region
x 0.23 · y 0.16 · w 0.54 · h 0.30 (high) - Sleeves and cuffsLong set-in sleeves that taper slightly to ribbed cuffs which fit snug at the wrists.
1 region
x 0.23 · y 0.20 · w 0.54 · h 0.26 (high) - Waist hemRibbed waistband hem sitting at the model's natural waist, slightly fitted against the body.
1 region
x 0.26 · y 0.42 · w 0.48 · h 0.06 (high) - Visible layeringA portion of a white crew neck T-shirt is visible beneath the open zipper at the chest, but the T-shirt is not part of this product observation beyond being visible under the sweater.
1 region
x 0.41 · y 0.20 · w 0.14 · h 0.06 (high)
Other
Studio product shot showing a male model standing against a plain light gray background with soft even lighting and minimal shadows; full body framing with slight ground shadow at feet.
- Model poseMale model standing facing forward with hands in front pockets and legs slightly apart; full body visible from head to shoes.
1 region
x 0.12 · y 0.02 · w 0.76 · h 0.96 (high) - Background and lightingPlain light gray seamless background with soft, even studio lighting producing minimal directional shadows and a faint cast shadow on the floor near the model's feet.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high) - Image crop and qualityFull-body, vertically oriented crop centered on the model; image is sharp with clear detail on fabric and facial features.
Colors
deep black· sweater body#0E0D16metallic silver· zipper pull and teeth#C3C2C4- Neck styleRaised mock-neck collar standing slightly open with the zipper partially unzipped to the upper chest, collar interior showing a contrasting lighter inner facing.
- 02

Product
Front view of a dark long-sleeve half-zip mock-neck sweater with a visible metal zipper and ribbed cuffs and hem, worn over a white crew T-shirt.
- Mock-neck collarShort stand-up mock neck with the front opened and folded slightly outward, revealing zipper teeth along the center front top.
1 region
x 0.35 · y 0.07 · w 0.29 · h 0.14 (high) - Half-zip closureVisible metal center-front zipper with exposed silver teeth and a flat rectangular metallic zipper pull hanging at the mid-chest.
2 regions
x 0.42 · y 0.13 · w 0.15 · h 0.18 (high); x 0.48 · y 0.21 · w 0.04 · h 0.06 (high) - Knit textureFine, even knit fabric visible across the torso and sleeves, smooth appearance without visible patterning beyond knit.
1 region
x 0.12 · y 0.18 · w 0.76 · h 0.66 (medium) - Ribbed hem and cuffsHorizontal ribbed knit at the bottom hem and at sleeve cuffs, slightly tighter knit than torso.
3 regions
x 0.28 · y 0.68 · w 0.44 · h 0.12 (high); x 0.12 · y 0.62 · w 0.18 · h 0.20 (medium); x 0.70 · y 0.62 · w 0.18 · h 0.20 (medium) - Fit and silhouetteFitted through the shoulders and torso with slight shaping at the waist; long fitted sleeves extending to ribbed cuffs.
1 region
x 0.12 · y 0.18 · w 0.76 · h 0.66 (medium) - Layering shownWhite crew-neck T-shirt visible under the partially opened zipper at the neck and upper chest.
1 region
x 0.40 · y 0.16 · w 0.20 · h 0.10 (high)
Other
Studio shot of a model wearing the sweater against a plain light gray background; hands in jean pockets and even soft lighting with minimal shadows.
- Model and poseMale model shown from head to hips, standing facing forward with hands in front pockets of jeans and a slight head tilt.
1 region
x 0.10 · y 0.00 · w 0.80 · h 1.00 (high) - Visible pantsBlue denim jeans visible from the waistband down to the top of thighs.
1 region
x 0.18 · y 0.76 · w 0.64 · h 0.22 (high) - Background and lightingNeutral light gray seamless background with soft, even studio lighting and faint shadowing under the arms and along the sides.
Colors
very dark navy· main body and sleeves#111116metallic silver· zipper and pull#BCBCBCwhite· visible underlayer- Mock-neck collarShort stand-up mock neck with the front opened and folded slightly outward, revealing zipper teeth along the center front top.
- 03

Product
Rear view of a long-sleeve mock-neck knit sweater. Visible features include a short ribbed mock collar, ribbed cuffs and hem, set-in shoulder seams, and an even fine knit texture across the back and sleeves.
- View and silhouetteBack view of a fitted long-sleeve sweater showing the full back panel and both sleeves to the wrists; hem falls to the top of the hips.
1 region
x 0.10 · y 0.08 · w 0.78 · h 0.77 (high) - Mock neckShort, close-fitting mock neck with visible vertical rib knit on the collar band.
1 region
x 0.36 · y 0.03 · w 0.28 · h 0.12 (high) - Hem and cuffsWide ribbed hem at the waist and narrower ribbed cuffs at the wrists, both in the same color and knit as the body.
3 regions
x 0.22 · y 0.73 · w 0.56 · h 0.14 (high); x 0.16 · y 0.60 · w 0.14 · h 0.20 (high); x 0.70 · y 0.60 · w 0.14 · h 0.20 (high) - Shoulder constructionSet-in shoulder seams visible from the back running from the neck to the sleeve tops.
1 region
x 0.24 · y 0.14 · w 0.52 · h 0.16 (high) - Knit textureEven, fine-gauge knit across the back and sleeves with a smooth matte appearance and no visible patterning.
1 region
x 0.18 · y 0.20 · w 0.64 · h 0.50 (high) - Closure visibilityNo zipper or other front closure is visible from the rear view.
Other
Studio shot of a model wearing the sweater against a plain light gray background; lower torso shows blue denim jeans as a prop. Lighting is soft and even with minimal shadows. Model is centered and cropped slightly above the head.
- Background and stagingPlain light gray seamless background with even studio lighting and minimal shadowing around the model.
- Prop visibleBlue denim jeans visible from the waist down used as styling prop; not described as part of the sweater.
1 region
x 0.18 · y 0.76 · w 0.64 · h 0.20 (high) - Model crop and poseModel stands facing away from camera with head turned slightly to the right; top of the head is cropped by the image frame.
1 region
x 0.34 · y 0.00 · w 0.32 · h 0.14 (high)
Colors
very dark black· body and sleeves#0D0C16very dark black· ribbed collar, cuffs and hem#0D0C16- View and silhouetteBack view of a fitted long-sleeve sweater showing the full back panel and both sleeves to the wrists; hem falls to the top of the hips.
Documents & Data
Customer Reviews
16 total16 reviews · out of 5
Great look!
This sweater is perfect for the casual work week.
Bien,mais pas pour moi!
Vêtement qui manque de souplesse,trop bulky.
Nice
I like it
Quality
Love it
Large was huge reordered in med
Love prompt easy order Best no postage
Très beau chandail
Tissu de très belle qualité confortable
Great quality and look
Great quality and look
x
x
Coupe parfaite
Tricot parfait pour la saison printanière
Très belle qualité
Très belle qualité
Doux et confortable
Belle qualité de finition, respire bien.
Present for nephew
The 1/4 zip is the latest for young men. My nephew loved it.
Non
Non
Belle qualité
Belle qualité
Confortable
Le tissu est doux et maintient sa forme. Vêtement de bonne qualité
1/4 Zip Sweater
Stylish and well-fitting. Good quality.
Q&A
3 answered- Can this sweater be machine washed or does it require dry cleaning?
- Care instructions are not provided in the product listing. The material blend (40% LENZING™ ECOVERO™ viscose, 40% recycled nylon, 20% cotton) and the 'silky knit' construction suggest delicate care — we recommend machine washing on a gentle cycle with cold water and laying flat to dry, but always follow the garment's care label for best results.
- Does the recycled nylon content affect the hand feel or weight of the sweater compared to standard nylon?
- The 'silky knit' description indicates a smooth, lightweight hand feel. Recycled nylon typically has a similar texture to standard nylon, and at 40% of the blend, it contributes to the silky feel without adding noticeable weight. The sweater should feel soft and comfortable against the skin.
- Is the LENZING™ ECOVERO™ viscose certified by any environmental standard (e.g., OEKO-TEX or EU Ecolabel)?
- LENZING™ ECOVERO™ viscose is generally certified by the EU Ecolabel for reduced environmental impact, but we do not have a specific certification statement for this particular sweater. The brand's commitment to sustainability suggests it likely meets recognized standards.