Smartwool Active Boxer Brief Boxed - Medium Gray Heather - XL

Chafing, overheating, and dampness can turn any activity into an ordeal. The Smartwool Active Boxer Brief tackles these issues head-on with a merino wool blend that keeps you dry, comfortable, and odor-free from morning commute to evening workout.

Who is it for

Men who demand performance from their base layer—runners, hikers, travelers, and anyone tired of synthetic underwear that traps sweat and smells. The slim fit and 5-inch inseam provide support without restriction, making it ideal for all-day wear.

Main features

• 86% ZQ-certified merino wool, 14% nylon for durability and stretch
• Core Spun Technology wraps merino around a nylon core for next-to-skin softness and resilience
• Merino-lined elastic waistband stays put without digging in
• Flatlock seams eliminate chafing and irritation
• Functional fly for convenience
• Naturally moisture-wicking, breathable, and odor-resistant
• Quick-drying and temperature-regulating for year-round comfort
• Boxed packaging for easy gifting or storage

Specifications

• Material: 86% Merino Wool, 14% Nylon
• Fabric weight: 150 g/m² (Merino 150)
• Fit: Slim
• Inseam: 5 inches (13 cm)
• Waistband: Merino-lined elastic
• Seams: Flatlock
• Fly: Functional
• Color: Medium Gray Heather
• Size: XL
• Care: Machine wash warm gentle cycle, tumble dry low

Tips

Pair with Smartwool Merino 150 base layer tops for a complete moisture-managing system. Wash inside out to preserve the fabric surface and avoid fabric softeners, which can coat merino fibers and reduce performance.