Nano-Air Light Bottom - Women's

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Patagonia Nano-Air Light Vest - Women's

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Fast-moving warmth meets breathable stretch in the Nano-Air Light Bottom for cold pursuits

What Our Gearhead® Experts Are Saying:

"I use these when I’m moving hard in cold conditions and don’t want to constantly add or remove layers. They breathe far better than insulated pants but still take the chill off during transitions. For touring or alpine missions, they’re incredibly versatile."

Cold-weather movement is all about balance, and the Nano-Air Light Bottom finds that sweet spot between warmth, stretch, and breathability. Designed by Patagonia for high-output days, these bottoms shine when we’re moving fast uphill, scrambling over ridges, or transitioning between effort and rest. They feel more dynamic than traditional insulated pants, adapting to our pace instead of fighting it.

FullRange® insulation provides lightweight warmth that continues to perform when damp, while air-permeable recycled ripstop fabric allows excess heat to escape as intensity ramps up. Stretch fleece panels along the sides and calves enhance mobility and reduce bulk, making these bottoms easy to layer under shells or wear on their own. With a harness-compatible waistband and streamlined pocket, they’re built for serious mountain travel where efficiency matters.

Details

Breathable insulated bottoms for high-output cold-weather activities
FullRange® insulation balances warmth, stretch, and airflow
Air-permeable recycled ripstop fabric reduces overheating
Stretch fleece panels enhance mobility and comfort
Slim fit layers easily under shells or over base layers
Harness-compatible waistband supports alpine use
Lightweight design ideal for touring, climbing, and fast missions
Item #PATZAQ6

Responsible Collection: Recycled/Repurposed, [side panels, cuffs material] bluesign® APPROVED
Material: [face fabric, lining] 30D 100% recycled polyester ripstop, PFC-free DWR treatment, [side panels, cuffs] 74% NetPlus post-consumer recycled nylon, 26% spandex power-stretch knit, miDori bioSoft treatment
Insulation: 40g FullRange (93% recycled polyester, 7% polyester)
Fit: slim
Pockets: 1 zippered thigh
Waist: elastic, internal drawcord
Anti-Odor: HeiQ Pure treated
Activity: climb, skiing, snowboarding
Manufacturer Warranty: lifetime

Patagonia

Nano-Air

Always On

Find Your Nano-Air

Nano-Air Ultralight

20g Insulation

A breathable, featherlight layer for nonstop alpine efforts.

Nano-Air Light

40g Insulation

Perfect balance of warmth and breathability for a range of conditions.

Nano-Air

60g Insulation

Innovative, breathable insulation tuned for daily wear.

Inside The Nano-Air

Match The Weight To The Day

Nano-Air's FullRange insulation comes in three weights, 20 to 60 grams, matched to how hard the day is working the body.

Durable Water Repellent Finish

Resists light moisture, without intentionally added PFAS.

Lightweight Features

Tuned For Comfort

FullRange insulation holds body heat while letting excess heat escape through the outer fabric. A microtextured liner pulls moisture off the skin and dries fast, keeping the layer from feeling wet or clammy through changes in effort.

Nano-Air Light

Steady warmth for cold-condition days spent moving at a steady pace. Twenty-gram FullRange insulation under the arms manages heat where the body runs hottest, so the layer stays on through changes in effort.