The Patagonia R1 Air Full-Zip Hoodie - Men's is a tech fleece full zip for moving quickly through the cold. Mountain adventures exert a lot of heat and energy, so when the temps are low, this lightweight, breathable fleece will help regulate body temperature. The 100% recycled polyester fleece features hollow-core yarns and a zigzag texture, which allows the fabric to wick moisture faster, dry faster, and remain even more breathable. Throw it on, adjust the front zip, and the low-profile hood will fit under a helmet if need be.