Patagonia Nano-Air Light Bottoms

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The Patagonia Nano-Air Light Bottoms are well-designed midlayer pants for active adventurers. They provide warmth, breathability, and stretch for high-intensity activities in cold weather. The recycled polyester shell is soft, durable, and eco-friendly.

Patagonia says: 

Unlike any midlayer bottoms you’ve ever worn, the Nano-Air® Light Bottoms deliver warm, stretchy and breathable performance for moving fast in cold climates.

Our Verdict

The Patagonia Nano-Air Light Bottoms are an impressive addition to your winter layering system. These midlayer bottoms were designed with the active adventurer in mind. They offer a comfortable, slim fit that allows for a full range of movement without the bulk typically associated with insulated trousers.

The Nano-Air Light Bottoms excel in breathability and stretch, making them ideal for high-intensity activities in chilly conditions. Whether tackling steep climbs or setting a brisk pace on a winter hike, the 40g FullRange® insulation provides just the right amount of warmth without causing you to overheat. The recycled polyester shell is soft yet durable, and the added stretch panels in the cuffs are particularly effective for slipping the trousers over alpine boots or pushing them up when you need more ventilation.

The smooth, stretchy waistband is comfortable and unobtrusive under a harness, and the zippered thigh pocket is perfectly positioned to stay out of the way, even when fully geared up. Weighing in at just 259 grams for a medium size, these bottoms strike a perfect balance between lightweight and robust, with eco-friendly materials being a welcome bonus for those conscious of their environmental footprint.

These bottoms are not just about warmth; they’re about freedom of movement and thoughtful design that harmonises with the rest of your gear. The Nano-Air Light Bottoms are well worth the investment if you stay active through the colder months.

– Reviewed by Ultralight Outdoor Gear

(Unfortunately, we are unable to ship Patagonia products outside of the European Area (defined as the European Economic Area plus Switzerland and the UK)

Features

• Slim-fitting and patterned to reduce bulky seams and maximize mobility
• Pull-on pants with a smooth, stretchy waistband and an internal drawcord adjustment layer comfortably under a harness
• Zippered right-thigh pocket stays out of the way of harness leg loops
• Cuffs feature quick-drying recycled nylon/spandex knit for enhanced stretch and movement, and push up easily to stretch over or tuck into alpine boots
• Fair Trade Certified™ sewn

Specifications

• Small weighs: 238g
• Medium weighs: 259g
• Large weighs: 280g
• XLarge weighs: 298g

Material & Construction

• Shell and lining: 1.6-oz 30-denier 100% recycled polyester airpermeable shadow stretch ripstop with a PFC-free DWR finish (durable water repellent coating that does not contain perfluorinated chemicals)
• Panels and cuffs: 5.8-oz 74% NetPlus® postconsumer recycled nylon made from recycled fishing nets to help reduce ocean plastic pollution/26% spandex power-stretch knit with miDori™ bioSoft for added wicking and softness, and HeiQ® Pure odor control.
• Insulation: 40-g FullRange® 100% polyester (93% recycled)
• Panel and cuff fabric is certified as bluesign® approved
• Made in a Fair Trade Certified™ factory

Help & advice:

• Recycled Content in Outdoor Gear
• Why is ‘PFC Free’ Important?
• The Bluesign System