Icebreaker Anatomica Long Boxers Thermal Underwear - Black, XL

When you're on the trail at dawn or commuting through a cold city morning, the Icebreaker Anatomica Long Boxers keep you comfortable with natural merino wool performance. In black, size XL, these thermal boxers are a premium base layer for active men who need reliable warmth, breathability, and odor control all day long.

Key specifications

• Material: 83% Merino Wool, 12% Nylon, 5% LYCRA®
• Fabric technology: Corespun for durability and next-to-skin softness
• Fabric weight: 150 g/m² – lightweight and versatile
• Fit: Slim fit with contoured pouch and gusset for mobility
• Waistband: Brushed elastic for all-day comfort
• Seams: Flatlock to prevent chafing
• Odor resistance: Natural, thanks to merino wool
• Care: Machine wash warm, tumble dry low

Why choose it

These boxers are built on Icebreaker’s renowned merino wool technology. The Corespun fibers wrap merino around a nylon core, enhancing strength while retaining the wool’s natural benefits. You stay warm when it’s cold and cool when it’s hot, with minimal odor even after multiple wears. The slim fit and anatomical design ensure a supportive, second-skin feel without restriction.

Ideal use cases

• Everyday comfort under casual or work attire
• Hiking, trekking, and travel where pack space is limited
• Winter sports as a breathable base layer
• Long days on the move when freshness matters

Good to know

Merino wool is mulesing-free and naturally renewable. The fabric is easy to care for: simply machine wash warm with like colors, avoid softeners and bleach, tumble dry low or line dry in shade. Cool iron if needed, and do not dry clean.