Arcteryx Men's Proton Crew Neck Fleece Jacket - Black | Lightweight, Breathable & Warm Midlayer for Hiking, Climbing & Outdoor Adventures

The Arc'teryx Proton Crew is a highly breathable and versatile midlayer designed for active pursuits in cold weather conditions. It features a combination of breathable and moisture-wicking materials that help regulate body temperature and keep you dry during intense activities. The crew's trim fit, stretchy fabric, and articulated patterning ensure a comfortable and unrestricted range of motion, making it a reliable choice for outdoor adventures or as a standalone top in milder conditions.