Unless your legs look like Saquatch's and can retain heat better than the Sun, you'll need some sort of baselayer to keep you warm on the mountain. May we suggest the Patagonia
Capilene® 3 Midweight bottoms? The Capilene® 3 Midweight and Polartec® combine to give you a superior level of warmth and heat retention, so you'll never have to cut your day short because your legs are to cold. Plus, the Gladiodor® anti-microbial finish will guard against any odor. Feel as warm as Sasquatch without the odd humanoid smells and check out the Patagonia
Capilene® 3 Midweight Pants.
Quick-drying fabric keeps you comfortable and dry
bluesign® Approved Fabrics - Patagonia has worked with the independently-owned bluesign® to ensure environmentally friendly practices.
Recycled Polyester - This material is made of recycled content such as scraps from the cutting room floor, old soda bottles and worn out garments.
Stretchy knit moves with you
Capilene® 3 Midweight - Patagonia's most versatile synthetic baselayer keeps you dry and warm in cool and cold conditions.
Polartec® - Warm, lightweight technical fabric that is four times more wind resistant then regular fabrics while also being highly breathable and water repellent
Galdiodor® - Combats odor with an anti-microbial finish