The Outdoor Research Helium Rain Jacket provides the most durable lightweight storm protection with the help of Diamond Fuse technology.PertexA(R) Shield Diamond Fuse 2.5L fabric is waterproof, windproof, breathable, durable, lightweight and fully seam tapedAdjustable hoodYKKA(R) AquaGuardA(R) zippersSingle separating center front zipperZip chest pocket doubles as stuff sackCarabiner loop and key clipReflective logo and overlay at forearmElastic drawcord hemElastic cuffsStandard fit