Men's Mountain Equipment Base Layer Trousers

Start warm. Stay dry. Keep moving.

Looking for a base layer that keeps your legs warm and dry through changing conditions? Our selection of Mountain Equipment base layer trousers for men features thermal leggings, long johns, and lightweight technical bottoms—all designed for high-output cold-weather activity.

Perfect for winter hillwalking, alpine missions, and layered systems in low temps.

Designed for thermal performance and freedom of movement

This collection includes:

• Lightweight, moisture-wicking base layer bottoms for dynamic use

• Thermal leggings to retain warmth without restricting mobility

• Long johns that sit comfortably under waterproof trousers

• Fast-drying, breathable fabrics to reduce chill and manage sweat

Tailored for active mountain use, these trousers help you regulate temperature and stay dry during sustained activity in cold conditions.

Not sure which base layer trousers you need?

• Layering for sub-zero climbs? Go with thermal leggings built for insulation

• Moving fast in the hills? Choose moisture-wicking lightweight trousers

• Want a reliable underlayer for waterproofs? These base layers fit easily beneath over trousers

Clearance-priced essentials for winter layering

All trousers in this collection are available at clearance pricing, offering dependable performance without the premium. Stock is limited and refreshes often.

Layer up from the legs down—don’t let the cold win.