"What Our Gearhead® Experts Are Saying:""The R1® Thermal Jacket is my go-to for cold alpine days. It’s lightweight yet provides incredible insulation and wind resistance. The slim fit layers perfectly under a shell, and the zippered pockets keep essentials secure. A reliable choice for anyone tackling technical terrain in frigid conditions.""When temperatures drop and the mountain calls, the Patagonia Women's R1® Thermal Jacket answers with unparalleled warmth and protection. Designed for alpine objectives, this technical fleece pairs a soft, breathable microgrid interior with a durable outer layer that resists wind and light snow. Zippered hand and chest pockets keep small essentials secure while maintaining a low profile under a harness or pack. Thumbholes ensure your hands stay warm and your sleeves stay in place, no matter how you move. Sustainably crafted in a Fair Trade Certified™ factory, this jacket performs as good as it feels—on the mountain and for the planet."