Constructed for the harshest alpine endeavors, Patagonia's R1® Thermal Bottoms are designed to defend against harsh conditions and provide warmth during activity. Crafted with a soft, breathable interior microgrid backing and a sturdy, weather-resistant exterior fabric, these pants offer protection from wind and snow.

Features:

• Smooth, durable outer face fabric sheds light snow and wind, and a soft microgrid-fleece backing wicks moisture to keep you warm and comfortable while moving in cold conditions
• Breathable, articulated and ultra-stretchy 91% recycled polyester Technostretch fabric provides unrestricted movement in the mountains
• Smooth waistband with a low-profile, internal drawcord provides an adjustable fit and is comfortable and easy to layer over
• Two zippered handwarmer pockets keep small items close and secure
• Slim-fit leg tapers through to the ankle for foot visibility and easy layering

• 6.5-oz 91% recycled polyester/9% spandex flat-faced Technostretch fleece