What Our Gearhead(R) Experts Are Saying:"The R1 Vest is perfect for core warmth without overheating. The grid fleece is lightweight and breathable, and it layers easily under a shell or over a base layer for added versatility."The Men's R1 Vest is a lightweight and versatile midlayer designed for cool-weather activities. Made with Polartec(R) Power Grid(TM) fleece, this vest provides breathable warmth by trapping heat while wicking moisture to keep you comfortable during high-output efforts. The slim fit ensures easy layering, whether you're on the trail or at the crag. Finished with HeiQ(R) Pure odor control and an anti-pilling treatment, this vest remains fresh and durable for repeated wear. Sustainably crafted from recycled materials and Fair Trade Certified(TM), the R1 Vest combines performance, comfort, and eco-conscious design for outdoor adventurers.