Base layer undershirt | from 96 to 105

Soft, midweight merino wool base layer that keeps you warm yet breathable, featuring a comfortable round neckline and long sleeves in deep navy. Ideal for layering during cold outdoor activities.

Navy blue long sleeve merino wool base layer shirt for men, providing warmth and comfort in cold weather conditions.

Lightweight, mid‑weight merino wool crew‑neck base layer in navy. Features breathable, moisture‑wicking fabric with natural temperature regulation and a comfortable fit for layering during outdoor activities.

Men's long sleeve thermal crew neck base layer made from merino wool for warmth and comfort.

Stay warm on rugged trails with Helly Hansen’s Lifa Merino Midweight Crew, a navy long‑sleeve base layer that blends breathable merino wool and moisture‑wicking fabric for steady comfort during winter adventures.

Windproof, water resistant and breathable - Windstopper fabric technology - Comfortable due to thermo-stretch functional material - Optimized flat seam placement for freedom of movement - Extended back section for splash protection

Stay warm and dry on any trail with this Odlo Blackcomb Eco women's long‑sleeve base layer in purple. The lightweight, breathable fabric wicks moisture while the snug fit keeps heat in, making it ideal for layering during cold workouts or outdoor adventures.