GEAR YOU CAN TRUST: The Deviator Fleece Half Zip offers superior warmth and breathability with thermo-regulating ActiveTemp for multi-use, high-aerobic versatility, worn alone or layered underneath a shell. SELF-ADJUSTING TEMPERATURE: ActiveTemp smart fabric thermoregulates automatically to match your exertion, without altering apparel material or quality. Experience increased comfort in any condition while staying focused on what matters. THRIVE OUTSIDE: Stay versatile and functional with intentionally designed raglan sleeves that mirror your movements to avoid chafing and comfortable built-in thumb holes. A zippered chest pocket is available for easy storage with keys and wallets. HIGH PERFORMANCE FABRIC: Experience quick-drying and moisture-wicking in this half zip, made from breathable polyester. Move comfortably with stretch-friendly material; Ultraviolet Protection Factor (UPF) 30+ has your back on sunny days. TRIM FIT, INCLUSIVE SIZING: This close-cut, figure-hugging 1/2 zip seamlessly moves with you without impeding or constricting your range of motion; our extended sizing includes options for all Female body types, ranging from XS–XXL. Discover optimal outdoor protection and performance with sportswear from Outdoor Research. Our founder, Ron Gregg, who was a nuclear physicist by trade, transformed his love for exploring mountains, rivers, and oceans into groundbreaking gear. His legacy lives on in our functional and versatile sportswear. From Gregg's pioneering X-Gaiter to our latest advancements, our gear is rooted in a tradition of excellence to offer exceptional quality, durability, and comfort in the harshest conditions. This function-forward approach has earned significant praise for our technical innovation and long-term reliability. Choosing Outdoor Research means embracing your next adventure with confidence, knowing you're fully equipped with sustainable gear that stands the test of time and cares for the planet.