The Rab Vapour-rise Flex Mens Vest makes fantastic use of their lightweight Vapour-rise technologies, being highly breathable and weather resistant. With a high wicking micro fleece liner that gives you lightweight core warmth, its ideal for high energy activity, or as an extra-warm layer for summer evenings. Matrix SWS stretch side panels ensure you have freedom to move when youre climbing or walking, and when not needed it stuffs away into its own inside pocket - perfect to clip to your belt or pack/harness. Pertex Equilibrium: 20d 49g/m2 100% nylon Matrix SWS: 75d 168g/m2 86% polyester, 14% spandex YKK front zip with internal storm flap and chin guard Fitted collar 1 YKK zipped chest pocket 1 internal YKK zipped pocket, doubles as an integrated stuff sack Half hem drawcord Reflective Trim Weight: 180g