Smartwool Men's Merino Boxer Brief Boxed Light Gray Heather Size S

Ordinary merino underwear often feels flimsy or loses its shape after a few wears, but the Smartwool Merino Boxer Brief Boxed changes the game with Core Spun Technology. By wrapping soft Merino wool fibers around a durable nylon core, this boxer brief delivers the natural temperature regulation and odor resistance of wool with the stretch and resilience of synthetic—so it stays comfortable and supportive from your morning commute to an evening trail run, without the itch or sag typical of lesser merino underwear.

Highlights

• 87% Merino wool, 13% nylon fabric (150 g/m²) balances warmth, breathability, and quick drying
• Core Spun Technology enhances durability while keeping Merino's natural odor resistance
• Slim fit with 6.5-inch inseam and functional fly for all-day comfort
• Flatlock seams and Merino-lined gusset prevent chafing during high-output activity
• UPF 20+ sun protection and natural moisture wicking for versatile wear

In daily use

From cold-weather layering to warm-weather hikes, the Merino Boxer Brief adapts to your body's needs. The elastic waistband is covered in Merino for a soft, secure hold without digging in. The slim fit stays close to the skin, reducing friction under pants or shorts, while the breathable fabric manages sweat and odor so you stay fresh longer between washes.

Full specifications

• Brand: Smartwool
• Model: Merino Boxer Brief Boxed
• MPN: 622243
• EAN: 196246590969
• Gender: Men's
• Product type: Boxer briefs
• Material composition: 87% Merino wool, 13% nylon
• Fabric weight: 150 g/m²
• Fit: Slim
• Inseam: 6.5 inches (16.5 cm)
• Waistband: Elastic, Merino-covered
• Seams: Flatlock
• Fly: Functional
• Gusset: Merino-lined
• Odor resistance: Natural (Merino wool)
• Moisture wicking: Yes
• Breathability: High
• Temperature regulation: Yes
• UV protection: UPF 20+
• Color: Light Gray Heather
• Size: Small (S)
• Intended use: Base layer, activewear, everyday
• Care: Machine wash cold, gentle cycle. Tumble dry low. Do not bleach. Do not iron. Do not dry clean.

Final note

Smartwool's Core Spun Technology ensures these boxer briefs maintain their shape and performance wash after wash, making them a reliable choice for any activity.