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Relaxed Fit Cotton Knit Boxer (Button Fly) - Black

$30.00

LOUNGE

Relaxed Fit Cotton Knit Boxer (Button Fly) - Black

Relaxed-fit knit boxer in premium dense cotton with a roomy boxer cut for sleep, lounging, and short-style casual wear. The self-fabric no-roll waistband helps reduce pressure and rubbing, while the tone-on-tone button fly and tagless design keep it clean and comfortable.

Color Black

Size S S 28-31 M 32-35 L 36-39 XL 40-43 2XL 44-47

Our fabric has natural stretch. Choose your size by actual waist and hip measurements.
Between sizes or prefer a snug fit? We recommend sizing down.

Size	Waist (in)	Hips (in)
S	28-31	32-36
M	32-35	37-40
L	36-39	41-44
XL	40-43	45-48
XXL	44-47	49-52
S	71-79 cm	81-91 cm
M	81-89 cm	94-102 cm
L	91-99 cm	104-112 cm
XL	102-109 cm	114-122 cm
XXL	112-119 cm	124-132 cm

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Buttery-Soft Premium Jersey Cotton

Loose-Fit Design for "Free Breathing"

Skin-Friendly Fabric-Encased Waistband

🟢 IN STOCK — Ships within 1–2 Business days

Boxers that bunch. Waistbands that dig. Fabric that traps heat all night?

Relaxed Fit — Air-Knit construction built for sleep and lounge. Maximum airflow, zero restriction. As soft as your favorite t-shirt, but made for what’s underneath.

• Loose-Fit Freedom
Relaxed cut that moves with you — no bunching, no riding up, no readjusting.

• Skin-Friendly Comfort
Fabric-encased waistband. No exposed elastic, no digging in — even after hours on the couch.

• Fabric-Encased Waistband
Wrapped in ultra-soft self-fabric. No exposed elastic, zero skin marks.

• Premium Pearl-Button Fly
Lustrous pearlescent button with reinforced stitching. Secure and stylish.

• Flexible Leg Opening
Loose fit through the thigh for total freedom.

• Tagless Label
Stamped-on care info, no annoying tags.

• Pre-Shrunk Knit
Maintains shape and size wash after wash.

• True-Color Retention
Deep-anchored pigments resist fading. Looks new wash after wash.

Fabric：Premium Cotton
Jersey Knit: Soft, breathable knit structure (like a premium T-shirt), not stiff.
4-Way Stretch: Moves with your body while you sleep, zero restriction.
Cool Touch: High airflow weave prevents overheating.

Fit: Relaxed, loose fit.
Material: 95% Premium Cotton, 5% Spandex.
Care: Machine wash cold, tumble dry low.

Relaxed Fit Cotton Knit Boxer (Button Fly) - Black

$30.00

Black S

SOFTNESS Premium

BREATHABILITY Excellent

DURABILITY Long-Lasting

NATURAL FEEL Pure Cotton

MOISTURE ABSORBENCY High

EASE OF CARE Machine Wash

Reinvented Comfort: Premium Jersey Cotton

T-Shirt Softness: High-end jersey knit that is soft, breathable, and never stiff.
4-Way Stretch: Moves with you during sleep for total, zero-restriction comfort.
Heat Regulation: A high-airflow weave actively prevents overheating.
Cool Touch: Engineered to keep you refreshed during lounging or sleep.

Irritation-Free: Fabric-Encased Waistband

Designed for sensitive skin, our waistband is fully wrapped in ultra-soft self-fabric. With no exposed elastic touching your body, it provides a secure, gentle hold that leaves zero skin marks and ensures all-day (and all-night) comfort.

Total Mobility: Flexible Leg Openings

Experience true "Free Breathing" with a precision-cut loose fit through the thigh. Engineered for maximum airflow and freedom of movement, these leg openings provide an airy, unrestrictive silhouette that stays comfortable in any position.

Refined Detail: Premium Pearl-Button Fly

Finished with a lustrous pearlescent button and reinforced stitching, our functional fly combines security with sophisticated style. The reinforced closure ensures a worry-free fit that stays closed when you need it while adding a touch of artisan luxury.

CREATOR TRY-ONS

Real Fit. Real Creators.

See how creators wear KingBriefs in real life — from everyday mirror shots to try-on videos that show the pair beyond the product page.

Relaxed Fit Cotton Knit Boxer (Button Fly) - Black

Relaxed Fit Cotton Knit Boxer (Button Fly) - Black

Premium CottonRelaxed Comfort

Reinvented Comfort: Premium Jersey Cotton

Irritation-Free: Fabric-Encased Waistband

Total Mobility: Flexible Leg Openings

Refined Detail: Premium Pearl-Button Fly

Real Fit. Real Creators.

Creator Photos

Creator Videos

Seen in real life.

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Premium Cotton
Relaxed Comfort

Zero-G™ MicroModal Boxer Brief · Side FlyBlack ↗ SELLING FAST

Classic Soft · Pixel Pulse MicroModal Brief · Horizontal FlyGlitch Blocks ◆ LIMITED DROP

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