Patagonia W's Nano-Air Light Bottoms

Stretchy, highly breathable winter trousers with synthetic fiber insulation for high-intensity activities in cold climates.

Patagonia’s W’s Nano-Air Light Bottoms combine the benefits of warm leggings with those of functional trousers and are particularly well-suited for quick activities in cold regions. As a midlayer, they provide support during intense stop-and-go activities on the mountain.

The supple outer fabric, made from recycled polyester ripstop, is stretchy and features a durable water-repellent finish. FullRange insulation provides warmth in the front and upper seat area while remaining highly breathable to prevent overheating. R1 thermal fleece panels on the sides increase freedom of movement and reduce volume under additional clothing.

The high, elastic waistband stays in place under a climbing harness or backpack strap and wicks away moisture. You can stow small items in the flat zip pocket on the right thigh, and the fast-drying, elastic leg cuffs can be pulled over or tucked into hiking boots.

As a result, the Nano-Air Light Bottoms provide light warmth, plenty of mobility, and a breathable feel during active activities.