The Patagonia Nano Air Light Bottoms are unlike any winter trousers you've ever experienced. Engineered for fast-paced activities in cold conditions, these innovative pants offer exceptional warmth, breathability, and stretch for uncompromised mobility. We find they work best under shell trousers in really cold Scottish conditions. They replace a skin tight base layer, being warmer, more breathable and they can be worn on their own in the pub after.

40-gram FullRange insulation delivers incredible warmth while maintaining exceptional stretch, allowing for unrestricted movement on the move. The lightweight, 100% recycled polyester ripstop construction offers generous mechanical stretch and superior breathability, keeping you comfortable and dry during exertion. The slim-fit design with minimal seams reduces bulk and maximizes your range of motion for technical ascents or high-output activities.

Patagonia Nano Air Light Bottoms Features

• 30-denier 100% recycled polyester air-permeable shadow stretch ripstop with a durable water repellent (DWR) finish
• 40-g FullRange insulation
• HeiQ Pure odor control
• Stretchy waistband and an internal drawcord adjustment
• Zippered right-thigh pocket
• Cuffs feature quick-drying recycled nylon/elastane knit
• Fair Trade Certified sewn