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 offers a sustainable choice with 85% reprocessed polyester, reducing CO2 emissions by 30-60% and energy use, while providing a smooth, stretchy fit with a no-slip waistband and double-layer front for light support and modesty under trousers, at $20—$3-8 less than comparable BN3TH and MNTD briefs—but it is limited to low-impact activities and feels warmer due to reduced breathability compared to natural fibers.
Verified claims
- Environmental savings
- 85% reprocessed polyester: zero crude oil, 30-60% less CO2, 45-85% less energy vs virgin.
- Care
- Machine wash cold, tumble dry low prevents pilling and shape loss, extending the brief’s life.
- Price comparison
- At $20, Le 31 costs $3-8 less than comparable BN3TH and MNTD briefs.
- Construction
- The textured no-slip waistband parallels BN3TH's no-roll band, and the double-layer front matches its supportive front construction; the Le 31 brief delivers these at a lower price.
- Modesty
- Prevents visible show-through with light-colored microfibre.
- Support
- Light support for low-impact activities; not for high-impact sports.
- Moisture management
- The double-layer front is designed to wick moisture away from the skin, keeping the pouch drier during light activity, though the fabric is less breathable than natural fibers.
- Lightweight feel
- Double layer is front-only, keeping the brief lightweight overall.
- Waistband
- The textured waistband grips via friction to prevent rolling, achieving a no-roll fit similar to BN3TH's band; this Le 31 brief is priced at $20 CAD.
- Fabric feel
- Smooth, soft microfibre feel; double-layer front adds thickness and moisture-wicking.
- Stretch
- 15% spandex provides stretch for a comfortable, adaptive fit.
- Breathability
- Less breathable than natural fibers; feels warmer in hot conditions.
- Discreet layering
- Smooth microfibre and double-layer front prevent outlines and show-through under lightweight trousers.
- Sustainability
- 85% reprocessed polyester reduces CO₂ emissions by 30-60% vs. virgin polyester.
- Double-layer front
- Double-layer front provides light support for low-impact activities like walking and stretching.
- Fit performance
- Stretchy fabric, textured waistband, and true sizing keep the brief secure during low-impact activity.
- All-day comfort
- One reviewer says the brief is comfortable enough not to be felt and stayed in place all day during walking and seated desk work.
Product record
- Title
- Microfibre Brief Retransformed Polyester
- Brand
- Le 31
- Price
- 20 CAD
- Availability
- In stock
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.