The women’s HELIUM Hybrid Hooded Jacket brings waterproofing and lightweight materials to trail running and summit climbing. A Pertex Shield 2.5L 30D ripstop shell is waterproof and windproof. Sweat-prone underarms and sides dump excess moisture through air-permeable Ferrosi fabric. Critically taped seams and laminate construction shut out the weather. The adjustable hood's wire brim makes for better rainy-weather visibility. The chest pocket zip is a waterproof YKK AquaGuard. The left of two zip hand pockets doubles as a stuff sack. Inner and outer storm flaps protect the front zipper. Low-Pro Binding cuffs keep bulk to a minimum.