Le 31
Microfibre Brief Retransformed Polyester
These Le 31 by Simons briefs are men's underwear made from a soft microfibre fabric of retransformed polyester, designed in Canada. They feature a double-layered front and a textured elastic waistband that stays in place. The classic brief silhouette provides full rear coverage with a contoured front pouch and high-cut legs.
- Category
- Apparel & Accessories > Clothing > Underwear & Socks > Underwear
Specifications
- Material
- 85% reprocessed polyester, 15% spandex
- Gender
- male
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Underwear & Socks > Underwear
Product Insights
Le 31’s Microfibre Brief Retransformed Polyester is a $20 CAD, in-stock underwear brief in 85% reprocessed polyester/15% spandex microfibre, made from post-consumer PET bottles rather than old garments or a closed loop, with softness, comfort and durability matching virgin polyester. Its core promise is a barely felt, stay-put brief for all-day walking and desk sitting: the textured waistband grips by friction without rolling or digging, the cut holds without shrinkage, and 15% spandex gives adaptive stretch. A double-layered front adds modesty and light contouring, not compression, with no bulk under clothing, while microfibre wicks and dries fast for travel laundry on the go. The tradeoff is that the doubled front runs warmest and slowest to dry, the fabric is warmer and less breathable than natural fibers, support is light and not for high-impact sports, and sizing is split—true to size for most but snug for some, so size up between sizes. There are 12 color-size variants at the same $20 with no sale, but Black and Navy only in Small and X-Large, Light Grey and White in all four sizes, and the ladder ends at X-Large. Recycled PET costs about 20% less than virgin, supporting the $20 price, but the 85/15 polyester-spandex blend is not mechanically recyclable because elastane clogs machinery and keeps the brief out of textile-to-textile recycling; wash cold and air dry to preserve the spandex waistband grip. Rating: 8 reviews.
Verified claims
- Fit performance
- The classic brief silhouette provides full rear coverage with high-cut legs, and the brief holds in place all day without ride-up during walking or desk sitting.
- All-day comfort
- Buyers report the soft microfibre brief is not felt and stays put all day, whether walking or sitting at a desk.
- Waistband
- The textured elastic waistband stays in place without rolling or digging.
- Sizing
- Buyers split on fit — true to size for most, snug for some; size up if between sizes.
- Stretch
- 15% spandex provides stretch for a comfortable, adaptive fit.
- Support
- The double-layered front and contoured front pouch provide light support for low-impact activities, not high-impact sports.
- Double-layer front
- Double-layered front adds modesty and light contouring, not compression, with no bulk under clothing.
- Material quality
- 85% reprocessed polyester, 15% spandex microfibre matches virgin polyester in softness, comfort and durability
- Recycled content
- This brief is 85% reprocessed polyester and 15% spandex, with the reprocessed polyester spun from post-consumer PET bottles rather than old garments or a closed loop.
- End of life
- The 15% spandex keeps this brief out of textile-to-textile recycling
- Moisture management
- The microfibre wicks and dries fast, but the polyester fabric breathes less than cotton and holds more heat in hot, humid weather.
- Breathability
- The 85/15 polyester-spandex fabric is warmer and less breathable than natural fibers like cotton or modal, so it suits cool or mild conditions better than extreme heat.
- Travel
- Dries fast, so it suits travel where laundry happens on the go.
- Shape retention
- Polyester holds the cut; wear shows as loosened elastic, not shrinkage.
- Care
- Wash cold and tumble dry low to preserve the spandex waistband grip.
- Recyclability
- The 85/15 polyester-spandex blend is not mechanically recyclable — elastane clogs the machinery
- Color availability
- 12 variants: Light Grey and White run all four sizes; Black and Navy only Small and X-Large.
- Size range
- The size ladder ends at X-Large, with nothing larger offered.
- Variant pricing
- All twelve color-size combinations are in stock at the same $20 with no sale price.
- Recycled value
- Recycled PET fiber costs about 20% less than virgin, so this 85% recycled brief sells for 20 CAD
- Fiber grade
- Apparel-grade recycled fibre, built for comfort and feel rather than industrial strength
- Leg openings
- The classic brief cut has minimal leg coverage, so there is far less fabric at the leg to bunch, roll, or dig; the soft microfibre edges sit flat against the leg for all-day wear.
- Origin
- Designed in Canada by Simons' in-house Le 31 line.
Product record
- Title
- Microfibre Brief Retransformed Polyester
- Brand
- Le 31
- Price
- 20 CAD
- Availability
- In stock
- Rating
- 8 reviews
Buying Guide
1 comparison · 4 sourcesUses
All-day comfort at a desk or on the move
Customer reviews describe these briefs as comfortable for wearing throughout the day, staying in place without riding up or bunching even after hours of sitting at a desk or walking. They are reported to feel like a second skin, and the textured waistband is designed to stay in place. Note that sizing feedback is mixed: some find them true to size while others find them a tad snug, so if you prefer a looser fit you may want to consider sizing up.[1]
Staying cool and dry in hot weather
A good pick for hot, humid days and light daily activity like walking, according to an aggregate of customer reviews, which describe the lightweight microfibre fabric as wicking moisture and breathing well to help prevent overheating and clamminess. The briefs also have micro-perforated panels that are intended to ventilate heat-prone areas, and reviewers report they stay in place while on the move.[1,2]
Product comparison
Compared within this brand.
| Microfibre Brief Retransformed Polyester: Choose this if you want a soft microfibre brief (85% reprocessed polyester, 15% spandex) for hot, humid days or long hours at a desk: reviewers report the lightweight, moisture-wicking fabric stays comfortable, breathes well, and does not ride up after hours of sitting or walking, with a textured waistband that stays in place. Note that sizing feedback is mixed — some find it true to size while others find it a tad snug — so consider ordering one size up if you are between sizes or prefer a looser fit.[1] | Stretch Ribbed Brief Organic Cotton And Recycled Polyester: Choose this if you want an everyday brief made from a blend of 65% recycled polyester and 35% reprocessed cotton, with reviewers describing the ribbed stretch fabric as soft, breathable, and comfortable from day one for all-day or active wear. It comes in Black, Grey, White, and Baby Blue across sizes Small to X-Large, and reviewers report it runs true to size for most with a secure, stay-put fit. Note that some reviewers found it runs short in the crotch, so if you need a longer rise or more front coverage, the same brand's boxer brief version may fit better.[3] | Striped-Band Brief Tencel™ Modal & Organic Cotton: Choose this if you want an everyday low-rise brief with a soft, lightweight 47% organic cotton and 47% TENCEL™ modal stretch-jersey blend (6% spandex) that reviewers describe as breathable and cool, with a no-roll elastic waistband and double-layered front. Reviewers report it holds up well through multiple wash cycles and its subtle striped band works under low-cut jeans or trousers. Note that reviewers say the fit runs about a size small with a crotch roughly half an inch narrower than competing briefs and tighter than the original Le 31 cotton version, so consider sizing up if you prefer a roomier pouch.[4] |
Image Analysis
2 images- 01
Product
Front-on view of a male model wearing plain white briefs with a wide elastic waistband; fabric appears smooth and slightly lustrous. The image shows the briefs' front panel, leg openings, and waistband seams.
- SilhouetteClassic brief silhouette with a high-cut leg opening, contoured front pouch, and a wide straight waistband sitting at the natural waistline.
1 region
x 0.17 · y 0.58 · w 0.66 · h 0.27 (high) - WaistbandWide elastic waistband in the same white color as the briefs with a subtle textured horizontal rib visible across its surface.
1 region
x 0.22 · y 0.56 · w 0.56 · h 0.05 (high) - Front panel constructionVertical center seam runs down the front pouch; two diagonal seams from the pouch to the waistband create paneling on each side.
1 region
x 0.32 · y 0.60 · w 0.36 · h 0.19 (high) - Fabric appearanceSmooth, fine-textured fabric with a slight sheen suggesting a microfibre or synthetic knit surface.
1 region
x 0.24 · y 0.58 · w 0.52 · h 0.22 (medium) - Leg openings finishNarrow, folded edge hem around the leg openings; hem sits flat against the model's upper thighs.
1 region
x 0.20 · y 0.72 · w 0.60 · h 0.09 (high)
Other
Studio shot of a torso-front model cropped above the chin and mid-thigh with even soft lighting on a neutral light gray background.
- View and cropFrontal view of the model cropped at the neck and mid-thigh so only torso, hips, and upper legs are visible.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high) - BackgroundEven, neutral light gray backdrop without visible texture or props.
- Lighting and shadowSoft studio lighting producing gentle shadows that emphasize musculature and the garment's contours.
- Visible model partsModel's bare torso, abdomen, hips, and both arms are visible; hands are relaxed at the sides with fingers visible.
1 region
x 0.05 · y 0.04 · w 0.90 · h 0.92 (high)
Colors
bright white· brief bodybright white· waistband- SilhouetteClassic brief silhouette with a high-cut leg opening, contoured front pouch, and a wide straight waistband sitting at the natural waistline.
- 02
Product
Rear view of a male brief on a model showing full rear coverage white microfibre brief with elastic waistband and curved leg openings.
- Silhouette and cutFull-coverage brief cut shown from rear with high-rise waistband and curved leg openings that extend down the upper thighs.
1 region
x 0.20 · y 0.52 · w 0.60 · h 0.36 (high) - WaistbandSingle-piece elastic waistband about a narrow band width, horizontally straight across the lower back with smooth finish.
1 region
x 0.20 · y 0.49 · w 0.60 · h 0.06 (high) - Fabric surfaceSmooth, matte microfibre appearance with minimal visible texture and no printed patterns.
1 region
x 0.28 · y 0.58 · w 0.44 · h 0.24 (high) - Leg seam finishNarrow, stitched seam following the curved edge of each leg opening, visible as a subtle contour line.
1 region
x 0.22 · y 0.68 · w 0.56 · h 0.18 (high) - Center-back stitchingSlight vertical seam or contour at the center back of the brief at the lower spine area.
1 region
x 0.46 · y 0.62 · w 0.08 · h 0.18 (medium) - Emboss or small marking on waistbandFaint, small raised or embossed mark at the center of the waistband; not fully legible in this image.Partial
1 region
x 0.47 · y 0.49 · w 0.06 · h 0.04 (low)
Other
Studio rear-shot of a model against a neutral light grey gradient background, centered composition with even soft lighting and minimal shadows.
- Shot compositionCentered rear view of a standing male model cropped from the base of the neck to the upper thighs; product positioned at image lower center.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high) - Background and lightingSmooth light grey gradient background with soft, even studio lighting producing minimal harsh shadows and subtle highlights on skin and fabric.
- Model presencePhotographed on a live model showing natural skin tones and musculature; hands visible at sides and head cropped at upper edge.
1 region
x 0.12 · y 0.04 · w 0.76 · h 0.92 (high) - Image qualityHigh-resolution studio image with sharp focus on product area and minimal visible noise.
Colors
white· brief body#F1F1F2white· waistband- Silhouette and cutFull-coverage brief cut shown from rear with high-rise waistband and curved leg openings that extend down the upper thighs.
Variants
12 SKUs| SKU | Title | Price | Avail |
|---|---|---|---|
| 4297787 | Microfibre Brief Retransformed Polyester - Black - Small | CA$20.00 | Yes |
| 4297790 | Microfibre Brief Retransformed Polyester - Black - X-Large | CA$20.00 | Yes |
| 4297792 | Microfibre Brief Retransformed Polyester - Light Grey - Small | CA$20.00 | Yes |
| 4297793 | Microfibre Brief Retransformed Polyester - Light Grey - Medium | CA$20.00 | Yes |
| 4297794 | Microfibre Brief Retransformed Polyester - Light Grey - Large | CA$20.00 | Yes |
| 4297795 | Microfibre Brief Retransformed Polyester - Light Grey - X-Large | CA$20.00 | Yes |
| 4297797 | Microfibre Brief Retransformed Polyester - White - Small | CA$20.00 | Yes |
| 4297798 | Microfibre Brief Retransformed Polyester - White - Medium | CA$20.00 | Yes |
| 4297799 | Microfibre Brief Retransformed Polyester - White - Large | CA$20.00 | Yes |
| 4297800 | Microfibre Brief Retransformed Polyester - White - X-Large | CA$20.00 | Yes |
| 4531771 | Microfibre Brief Retransformed Polyester - Navy/midnight Blue - Small | CA$20.00 | Yes |
| 4531774 | Microfibre Brief Retransformed Polyester - Navy/midnight Blue - X-Large | CA$20.00 | Yes |
Documents & Data
Customer Reviews
8 total8 reviews · out of 5
Comfort
Tissu
Nice light brief
Nice light material with moisture wicking properties. They run a tad small but still fit and aren’t too tight. Great colourways.
oui je le recommande
oui je le recommande
Mon chum les aime.
Mon chum les aime.
Tissus de bonne qualité
Tissus de bonne qualité
Confort idéal
Taille juste, confort idéal. On ne les sent pas du tout. Ils n'ont pas bougé de la journée (marche + position assise au bureau).
Caleçon
Bien ajusté.
Great underwear
Very comfortable. Look great.