Thermal Arm Warmers Lightweight, thermal, and breathable—the WYN Thermal Arm Warmers are your go-to layer for unpredictable conditions. Crafted from premium Italian fabric with a cozy fleece backing, these warmers keep you comfortable on brisk mornings and roll up small when it’s time to stow. With a stay-put silicone gripper and subtle reflective detailing, these arm warmers are perfect for early rides, descents, and transitional seasons.