
Jack & Jones
3.5" Cotton Trunk
The Jack & Jones at Le 31 3.5" Cotton Trunk is a men's form-fitting trunk underwear designed for everyday wear under clothing. It has a 9 cm (3.5 in) inseam, an elastic waistband, a double-layered front, and stretch organic cotton jersey fabric in dark heather gray with a black waistband. Key construction details include contoured front seaming and short leg hems.
- Material
- stretch organic cotton jersey
- Gender
- male
- Style
- casual, minimal
- Category
- Apparel & Accessories > Clothing > Underwear & Socks > Underwear
Specifications
Comfortable stretch organic cotton trunk with elastic waist and double-layered front.
Elastic waist, stretch organic cotton jersey, double layered front, 3.5" inseam
- Material
- stretch organic cotton jersey
- Style
- casual, minimal
- Occasion
- everyday, casual
- Gender
- male
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Underwear & Socks > Underwear
Additional Attributes
- elastic waistband
- ultra-comfortable stretch organic cotton jersey
- double layered at the front
- 3.5" inseam (9 cm)
- Jack & Jones brand
- available at Le 31
- trunk style underwear
- organic cotton material
- stretch fabric for comfort
- jersey knit construction
Product Insights
3.5" Cotton Trunk 15 CAD Slim European cut; size up if between sizes 3.5-inch inseam gives minimal thigh coverage 95% organic cotton, 5% spandex Flat $15 across all 12 color-size combinations, including XL
Verified claims
- fit_and_sizing
- Slim European cut; size up if between sizes
- inseam
- 3.5-inch inseam gives minimal thigh coverage
- material
- 95% organic cotton, 5% spandex
- knit_construction
- Jersey knit with spandex gives second-skin fit and shape retention
- moisture_management
- Breathable cotton helps manage moisture and reduce chafing
- waistband_comfort
- Elastic waistband is built to stay put without digging in
- waistband_recovery
- Waistband elasticity can weaken over time; air-drying helps preserve it
- front_construction
- Double-layered front with contoured pouch adds support and structure
- care_washing
- Wash at 40°C and turn inside out; fabric softener optional
- care_drying
- Air-drying better preserves elasticity than tumble drying
- care_laundry
- Avoid tight laundry bags and washing with rough fabrics like denim
- durability
- Underwear is a replaceable basic; refresh pairs as fabric and waistbands wear
- colorways
- Charcoal, Navy/Midnight Blue and Burgundy cover neutral, classic and accent roles
- brand_philosophy
- Jack & Jones positions these as everyday basics with clean finishing
- styling
- Heathered knit and contrast waistband branding give a sporty, branded look
- seam_finishing
- Rear center seam and folded leg hems shape the trunk and finish the short legs
- suitable_uses
- Good for everyday wear, warm weather and fitted trousers
Product record
- Title
- 3.5" Cotton Trunk
- Brand
- Jack & Jones
- Price
- 15 CAD
- Availability
- In stock
Buying Guide
1 comparison · 8 sourcesUses
Everyday trunk in stretch organic cotton
Jack & Jones describes this trunk as ultra-comfortable stretch organic cotton jersey with an elastic waist and double-layered front, sized with a 3.5 inch inseam. In the product image it appears as a close-fitting trunk with short legs ending above the mid-thigh, a style worn as daily underwear.[1,2]
Product comparison
Compared within this brand.
| 3.5" Cotton Trunk: Choose this if you want a low-rise trunk with an ultra-comfortable stretch organic cotton jersey blend of 95 percent organic cotton and 5 percent spandex, an elastic waistband with bold white branding, and double-layer front construction. Its short 9 cm (3.5 inch) inseam ends above mid-thigh, so it suits those preferring minimal leg coverage, and it comes in Small through X-Large across three colors. Note it is a close-fitting style and the visible waistband lettering was transcribed only partially, if that matters to you.[1,2] | 3" Comfort Trunk Cotton: Choose this for a very comfortable stretch cotton jersey trunk with a short 3-inch inseam, cut close-fitting and mid-rise with a contoured front pouch and double-layered front. It features an exposed elastic waistband with repeating brand text, and the Patterned Blue colourway shows an all-over skull-and-floral print over a medium blue background. Note that only size SMALL appears in the saved listing, offered in Navy/Midnight Blue and Patterned Blue.[3,4,5] | 3" Solid Comfort Trunk Cotton: Choose this if you want a short 3-inch inseam trunk in soft stretch cotton jersey, made of 95% cotton and 5% elastane, with an elastic waistband and a double-layered front. The retailer describes the fabric as very comfortable, and the trunk comes in sizes from small to x-large in a solid light grey with a subtle embossed Jack & Jones wordmark waistband. Note that comfort is the retailer's description rather than a reported customer experience, and the image analysis shows the rise differently from front and rear views, so the fit on the waist may vary.[6,7,8] |
Image Analysis
2 images- 01

Product
Front view of a male model wearing dark heather gray trunk briefs with a black elastic waistband printed in white. Visible features include contoured front pouch seam lines, vertical side seams, and short leg hems.
- Garment silhouetteForm-fitting brief/trunk style covering upper thighs with short leg length and a low-rise waistline on the model
1 region
x 0.17 · y 0.58 · w 0.66 · h 0.36 (high) - WaistbandElastic black waistband with a high-contrast white logotype and two horizontal white stripes at the right side
1 region
x 0.15 · y 0.50 · w 0.70 · h 0.09 (high) - Waistband text“CK & JONES”
1 region
x 0.17 · y 0.51 · w 0.56 · h 0.08 (high) - Front pouch and seamsContoured front pouch formed by a central curved seam and additional vertical stitching lines on each side creating a panelled front
1 region
x 0.30 · y 0.64 · w 0.40 · h 0.18 (high) - Side seamsVisible vertical seam running along each outer hip connecting front panel to side/back panels
2 regions
x 0.17 · y 0.60 · w 0.10 · h 0.29 (high); x 0.73 · y 0.60 · w 0.10 · h 0.29 (high) - Leg hemsNarrow folded hems at the bottom of each leg opening finishing the short trunk legs
2 regions
x 0.20 · y 0.86 · w 0.25 · h 0.08 (high); x 0.55 · y 0.86 · w 0.25 · h 0.08 (high) - Fabric textureFine heathered knit appearance on the trunk fabric suggesting a two-tone yarn; surface appears smooth
1 region
x 0.22 · y 0.62 · w 0.56 · h 0.30 (medium)
Other
Studio product shot showing a cropped male model against a plain white background with soft, even lighting and minimal shadows.
- Model framingImage framed from the model's upper thighs to just above the mouth; head is partially visible and cropped at the nose and above
1 region
x 0.00 · y 0.00 · w 1.00 · h 0.70 (high) - BackgroundUniform white background filling the frame
- Lighting and shadowSoft studio lighting from the front and slightly above producing gentle highlights on the model's torso and minimal cast shadows
Colors
black and white (waistband)· waistbanddark heather gray· main fabricwhite· waistband text and stripes- Garment silhouetteForm-fitting brief/trunk style covering upper thighs with short leg length and a low-rise waistline on the model
- 02

Product
Rear view of a fitted dark heather gray knit trunk on a model: low-rise elastic waistband with bold contrasting brand text, vertical rear seam, and short leg length ending above the mid-thigh.
- WaistbandWide elastic waistband in black with bold white brand text wrapping across the back.
1 region
x 0.18 · y 0.53 · w 0.64 · h 0.08 (high) - Brand text on waistband“CK & JONES=”
1 region
x 0.24 · y 0.53 · w 0.48 · h 0.08 (high) - Fabric and fitDark heather gray stretch knit fabric forming a close-fitting trunk silhouette that contours the hips and buttocks.
1 region
x 0.22 · y 0.61 · w 0.56 · h 0.28 (high) - Rear center seamSingle vertical seam runs down the center of the rear panel, visible as a stitched line.
1 region
x 0.45 · y 0.57 · w 0.10 · h 0.26 (medium) - Leg openings hemStraight hem at the end of the short legs, finishing above mid-thigh with narrow folded stitching.
1 region
x 0.22 · y 0.85 · w 0.56 · h 0.10 (high)
Other
Studio rear-view shot of a model wearing the trunk against a plain white background with even soft lighting; image cropped above the head and below the knees.
- Shot compositionThree-quarter rear view of a standing model, framed from above the shoulders to the upper thighs, model turned slightly to the left.
- Background and lightingClean white background with soft, even studio lighting and minimal shadows.
- Image croppingTop of the model's head is cropped out; hands are visible at the lower left and right edges of the frame.
Colors
dark heather gray· trunk fabric#575558black· waistband background#141214white· waistband text- WaistbandWide elastic waistband in black with bold white brand text wrapping across the back.
Variants
12 SKUs| SKU | Title | Price | Avail |
|---|---|---|---|
| 4807575 | 3.5" Cotton Trunk - Charcoal - Small | CA$15.00 | Yes |
| 4807576 | 3.5" Cotton Trunk - Charcoal - Medium | CA$15.00 | Yes |
| 4807577 | 3.5" Cotton Trunk - Charcoal - Large | CA$15.00 | Yes |
| 4807578 | 3.5" Cotton Trunk - Charcoal - X-Large | CA$15.00 | Yes |
| 4813947 | 3.5" Cotton Trunk - Navy/midnight Blue - Small | CA$15.00 | Yes |
| 4813948 | 3.5" Cotton Trunk - Navy/midnight Blue - Medium | CA$15.00 | Yes |
| 4813949 | 3.5" Cotton Trunk - Navy/midnight Blue - Large | CA$15.00 | Yes |
| 4813950 | 3.5" Cotton Trunk - Navy/midnight Blue - X-Large | CA$15.00 | Yes |
| 4813951 | 3.5" Cotton Trunk - Burgundy - Small | CA$15.00 | Yes |
| 4813952 | 3.5" Cotton Trunk - Burgundy - Medium | CA$15.00 | Yes |
| 4813953 | 3.5" Cotton Trunk - Burgundy - Large | CA$15.00 | Yes |
| 4813954 | 3.5" Cotton Trunk - Burgundy - X-Large | CA$15.00 | Yes |