Patagonia Nano-Air Light Bottoms - Women'sby Patagonia

Product Info

Built for high-output missions in cold weather, the Nano-Air® Light Bottoms bring the heat without the sweat. Stretchy, breathable, and slim-fitting, they move like tights but work like a midlayer—complete with FullRange® insulation, alpine-ready cuffs, and a harness-compatible waist. Basically, they're the secret weapon your layering system didn’t know it was missing. Fair Trade Certified™ sewn.

Intended use: Snowsports, Backcountry touring, Hiking, Climbing, Insulation

Weather conditions:  All-weather

Technical Features

Warmth Rating

Designed for high-output activity (think ski touring, alpine climbing, or fast hiking), where breathability is key and you’re generating your own heat. Insulated with 40g FullRange®, which is lighter than standard Nano-Air pieces and prioritizes air permeability over maximum warmth.Great for moving fast in cold conditions, but not meant for low-output or super-cold static use (like sitting at camp or lift-riding all day).

FullRange® Insulation

FullRange® insulation is a breathable, stretchy synthetic insulation developed by Patagonia for high-output activities in cold weather. The 40g weight version is the lightest in the lineup, offering just enough warmth while maximizing airflow, flexibility, and comfort. It’s designed to keep you warm while moving, not overheating—making it ideal for fast climbs, ski tours, or any time you’re working hard in cold conditions.  In short - warm when you need it, cool when you don’t.

1% for the Planet

Since 1985, Patagonia has pledged 1% of sales to the preservation and restoration of the natural environment.  They've awarded over $140 million in cash and in-kind donations to domestic and international grassroots environmental groups making a difference in their local communities. 1% for the Planet is an alliance of businesses that understand the necessity of protecting the natural environment. They understand that profit and loss are directly linked to its health, and are concerned with the social and environmental impacts of industry.

Fair Trade Certified™

Fair Trade Certified™ is a certification that ensures products are made according to rigorous social, environmental, and economic standards. For apparel, this means the factory workers who made the product receive additional wages through a community development fund, work in safer conditions, and are supported by policies that promote empowerment and sustainability.  Through their partnership with Fair Trade USA™, Patagonia has been making Fair Trade clothing since 2014. Today, they are proud to offer more styles made in a Fair Trade Certified™ factory than any other apparel brand—over 90% of their line. To date, Patagonia’s Fair Trade program has impacted more than 85,000 workers around the globe.

Patagonia Women’s Sizing

**Measurements provided are in inches

Additional details