Arcteryx says about the Gamma Lightweight Jacket
Recycled Fortius™ 1.0 softshell is durable, lightweight, has performance stretch, offers UPF 50+ protection, and is made with recycled nylonFC0 DWR (Durable Water Repellent) treatment repels moistureDual zippered chest pockets are secure and harness-accessibleZippered hand pockets secure small essentialsElastic binding at cuffs holds sleeves in placeAdjustable hem secures the fit and seals out draftsRegular fit with articulated patterning for mobility and comfort