The Men's Patagonia R1 Fleece Jacket is durable, stretchy, and breathable for layered warmth on cold weather adventures. Polartec Power Grid fabric is hybridized with Capilene Thermal Weight base layer fabric to reduce bulk and make this lightweight layer even lighter, with HeiQ Pure odor control to keep things fresh. The hybrid design boosts warmth around the core while improving underarm breathability and venting extra heat. The offset shoulder seams offer comfort under a pack and easy layering, and zippered pockets with air-permeable mesh pocket bags maintain breathability and stay clear of a harness or a pack waistbelt.