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Patagonia's breathable Polartec Power Grid fleece excels as a midweight layer during high-output cold-weather movement
The Patagonia R1 Jacket is built for the aerobic middle ground, the sustained effort where a midweight fleece traps too much heat and a baselayer alone isn't enough. The Polartec Power Grid construction uses a textured grid on the interior to push moisture off the skin and circulate air, keeping output high without the clammy buildup that kills a cold-weather climb. On multi-day approaches where laundry isn't an option, the HeiQ Pure anti-odor treatment and the grid's fast-drying structure work together to keep the jacket in rotation through back-to-back days.
What Our Gearhead® Experts Are Saying:
"I wear this on the approach when I'm moving hard enough that a heavier fleece would have me soaked. The grid construction vents heat before it builds up, so I stay dry through the crux of the climb."
Details
- Lightweight full-zip fleece jacket for hiking and climbing at high output
- Polartec Power Grid construction vents heat and moves moisture during aerobic effort
- HeiQ Pure anti-odor treatment extends the jacket's useful range across multi-day use
- Two zippered hand pockets and one zippered chest pocket secure essentials on the move
- Slim fit layers cleanly under a shell without bulk
- Item #PATZASM
- Responsible Collection
- Recycled/Repurposed, Bluesign Approved
- Material
- [face fabric] Polartec Power Grid 93% recycled polyester, 7% spandex grid fleece with anti-pilling finish, [inner-arm, side panels, lower sleeves] Polartec Power Grid 92% recycled polyester, 8% spandex jersey with anti-pilling finish
- Fleece Weight
- Lightweight
- Fit
- Slim
- Length
- Hip
- Hood
- None
- Pockets
- 2 zippered hand, 1 zippered chest
- Anti-Odor
- HeiQ Pure
- Claimed Weight
- 12.1oz (343g)
- Activity
- Hiking, Climbing
- Manufacturer Warranty
- Lifetime

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Patagonia is a global leader in outdoor apparel, known for its unwavering commitment to environmental and social responsibility.