The Acre Series Vest is designed to be fast and light. Performing well under high energy activities such as cycling, running, and hiking. The Pertex shell and 40g Primaloft Gold insulation allows excess heat and vapor to escape while maintaining a radiant layer of warmth close to your core.Our PertexA(R) Quantum face fabrics are BLUESIGN certified and utilize an environmentally friendly PFC-free water-repellent coating that sheds light rain and snow.Insulated with PrimaLoftA(R) 40g Gold Active+, the Acre Vest provides warmth without bulk, is breathable, and utilizes 55% recycled fibers.*Non-cycling users may want to size up for more traditional fit