
Undz
5" Rally Car Boxer Brief Polyester
These Undz 5-inch Rally Car boxer briefs are men's underwear made from a stretchy, ultra-light Maxvent microfibre (polyester) that wicks moisture and dries quickly. They feature an elastic waistband, a double-layered front panel, and a 5-inch inseam. The design includes a full-coverage photographic rally car print on a light blue background, with a wide black waistband and a vertical front pouch seam.
- Material
- Maxvent microfibre
- Category
- Apparel & Accessories > Clothing > Underwear & Socks > Underwear
Color
Size
Specifications
Stretch ultra-light Maxvent microfibre boxer briefs with moisture-wicking and quick-drying properties, elastic waistband, and double layered front.
Ultra-light Maxvent microfibre, moisture wicking, quick drying, elastic waistband, double layered front, 5 inch inseam.
- Material
- Maxvent microfibre
- Gender
- male
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Underwear & Socks > Underwear
Additional Attributes
- Stretch ultra-light Maxvent microfibre
- Moisture-wicking and quick-drying fabric
- Elastic waistband
- Double layered front
- 5-inch inseam
Product Insights
These 5" Rally Car Boxer Briefs from Undz wick sweat and dry up to five times faster than cotton, with a cool initial touch and a smooth microfibre surface that minimizes friction and bunching. The double-layered front panel and absent fly reduce internal seams and chafing while providing pouch support, and the fabric withstands over 30,000 Martindale cycles for durability. However, their polyester microfibre traps odor-causing bacteria, requiring washing inside-out with sports detergent and avoiding fabric softener; cold gentle washing and air drying preserve elasticity and wicking performance.
Verified claims
- Wicking
- Wicks sweat and dries up to 5 times faster than cotton.
- Fabric softener
- Avoid fabric softener to maintain moisture-wicking performance.
- Durability
- Fabric withstands over 30,000 Martindale cycles, preserving wicking performance.
- Cool touch
- Immediate cool feel on first wear, strongest initially.
- Friction reduction
- Smooth microfibre surface minimizes friction and fabric bunching under clothing.
- Seam comfort
- Double-layered front panel and absent fly reduce internal seams and chafing.
- Pouch support
- Eliminates a separate fly panel, reducing skin-on-seam friction for a smoother profile.
- Fabric performance
- Both front layers use Maxvent microfibre for active moisture wicking and all-day breathability.
- Odor
- 95% polyester microfibre traps odor-causing bacteria from sweat.
- Washing recommendations
- Turn boxer briefs inside-out before washing and use sports detergent to manage odor.
- Design mitigation
- Double front panel wicks sweat to prevent dampness that causes odor.
- Abrasion resistance
- Fabric exceeds 30,000 Martindale abrasion cycles, about double cotton.
- Fabric care
- Cold water wash, gentle cycle, and air drying preserve the fabric's elasticity and prevent pilling.
- Care instructions
- Preserve spandex and wicking: cold gentle wash, no softener, air dry; inside-out for odor.
Product record
- Title
- 5" Rally Car Boxer Brief Polyester
- Brand
- Undz
- Price
- 20 CAD
- Availability
- In stock
Image Analysis
2 images- 01

Product
Pair of fitted boxer briefs shown on a male model from mid-chest to mid-thigh; a wide black elastic waistband with a small centered light-blue rectangular brand label is visible. The front panel features a full-coverage photographic rally car print with a vertical front pouch seam.
- Overall silhouetteFitted mid-thigh boxer brief cut displayed on a model, waistband sits at natural waist, legs extend to upper to mid-thigh.
1 region
x 0.12 · y 0.34 · w 0.76 · h 0.56 (high) - WaistbandWide black elastic waistband wrapping around the waist with a centered sewn-on rectangular light-blue label bearing the brand text.
1 region
x 0.22 · y 0.33 · w 0.56 · h 0.06 (high) - Front pouch seamSingle vertical seam runs down the center front from the waistband to the crotch area creating a defined pouch contour.
1 region
x 0.45 · y 0.38 · w 0.10 · h 0.30 (high) - Printed front panelPhotographic rally car graphic printed across the entire front panel and upper thighs, covering both left and right panels and wrapping slightly toward the sides.
1 region
x 0.18 · y 0.44 · w 0.64 · h 0.40 (high) - Leg openingsLeg openings have a narrow folded hem with a smooth finish, lying flat against the model's thighs.
1 region
x 0.18 · y 0.78 · w 0.64 · h 0.12 (high) - Fabric appearanceSmooth, slightly glossy knit surface consistent with synthetic performance fabric; print detail is high-resolution and continuous over seams.
- Graphic text on car“UNDZ RACING”
1 region
x 0.32 · y 0.46 · w 0.36 · h 0.06 (high) - Waistband label text“UNDZ”
1 region
x 0.47 · y 0.34 · w 0.06 · h 0.04 (high)
Other
Studio product shot cropped at the model's mid-chest and mid-thigh against a light neutral background; even soft lighting with minor shadows and visible model hands at image sides.
- Shot framingImage cropped from just below the model's pectorals to just above mid-thigh, centering the underwear front panel.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high) - BackgroundSmooth light grey background with even studio lighting and soft shadow along the model's left side.
- Model presenceMale torso and upper legs visible; both hands appear near the image lower corners with fingers relaxed.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high)
Colors
black· waistbandlight cyan· waistband labelsky blue· main fabric background#9CC4E3white· car body#F3EBEBbright red· car stripe and roof banner#A56A4Bmud brown· mud and tire areas- Overall silhouetteFitted mid-thigh boxer brief cut displayed on a model, waistband sits at natural waist, legs extend to upper to mid-thigh.
- 02

Product
Rear view of a pair of printed boxer briefs worn by a model; black elastic waistband and a photographic rally car print across the seat and upper thighs on a light blue background.
- Overall silhouetteForm-fitting mid-thigh boxer brief cut worn on a model, rear view showing waistband at natural waist and leg openings at upper to mid-thigh.
1 region
x 0.14 · y 0.20 · w 0.72 · h 0.62 (high) - WaistbandPlain elastic waistband in solid black with a centered vertical seam at the back.
1 region
x 0.24 · y 0.33 · w 0.52 · h 0.06 (high) - Main fabric and print placementLight blue base fabric with a full photographic print that wraps across the seat and upper legs; main graphic is a rally car positioned across the buttocks with the car facing left on the wearer's right.
1 region
x 0.18 · y 0.39 · w 0.64 · h 0.46 (high) - Car windshield text“UNDZ RACING”
1 region
x 0.28 · y 0.46 · w 0.36 · h 0.07 (high) - Front license plate text“334 RS 683”Partial
1 region
x 0.20 · y 0.56 · w 0.20 · h 0.08 (medium) - Print conditionPhotographic print includes realistic mud splatter and dirt on the car body and wheels, visible texture from the printed image.
1 region
x 0.22 · y 0.48 · w 0.46 · h 0.28 (high) - Side seam detailVisible vertical side seam on the wearer's right side, running from waistband to leg opening with light stitching visible.
1 region
x 0.74 · y 0.36 · w 0.06 · h 0.44 (high)
Other
Studio rear-shot of a model cropped at mid-back and mid-thigh on a neutral light gray background with even lighting and soft shadows.
- Shot compositionCentered rear-facing model cropped from just below the shoulder blades to mid-thigh; product and model fill most of the frame.
1 region
x 0.06 · y 0.05 · w 0.88 · h 0.90 (high) - BackgroundSmooth neutral light gray background with no visible props or textures.
- Lighting and shadowEven soft studio lighting with subtle shadowing around the model's legs and lower back, no strong directional glare.
- Model hands and armsModel's arms hang naturally at sides with hands visible near the outer frame edges; hands are not interacting with the product.
2 regions
x 0.02 · y 0.55 · w 0.12 · h 0.34 (high); x 0.86 · y 0.55 · w 0.12 · h 0.34 (high)
Colors
black· waistband#3B1504light sky blue· main fabric background#A4CCEBwhite· car bodyracing red· car red accentsmud brown· mud and dirtdark charcoal· tires and grille- Overall silhouetteForm-fitting mid-thigh boxer brief cut worn on a model, rear view showing waistband at natural waist and leg openings at upper to mid-thigh.