The Hyperia Lite Hybrid Vest offers technical performance with natural merino insulation. The Hyperias ultralight yet durable Pertex Quantum Air face fabric features a DWR finish that sheds variable conditions. Inside, we used our innovative 100g MerinoLOFT insulation, a sustainable and high-lofting alternative to synthetic fills that retains warmth even when wet. The Hyperia also features merino-blend terry stretch side panels to regulate body temperature, improve range of motion and keep you comfortable everywhere from local rock climbs to backcountry hut trips. Zippered hand pockets and an internal zip pocket store small essentials, offset shoulder seams eliminate chafing when youre moving with a pack and the vest stows in its internal pocket for premium packability. Fabric: Body: 100% Nylon. Panels: 46% Nylon, 38% Merino Wool, 16% LYCRA. Fill: 88% Merino Wool, 12% Polylactide, Product Weight: Medium = 250 g / 8.81 oz Care: Machine wash cold (30C); delicate cycle. Wash with like colors. Do not use softeners. Fasten all closures to wash and dry. Do not bleach. Do not tumble dry. Line dry in shade. Cool iron. Do not dry clean.