Keep your vision clear on those wet and wild days on trail with the Montane Cetus. Whether hiking, running or trekking, a waterproof cap is one of the lightest and most effective pieces of weather protection you can carry. The Cetus is built with Montane's proprietary PETRICHOR membrane for complete water and wind proofing, and exceptional breathability. Features Lightweight, low profile bungee adjustment. Fully waterproof (20,000mm HH) and highly breathable (RET < 7) Fully seam taped, designed with minimal seams to improve breathability, durability and reduce weight. Stiffened, pre-curved brim for effective rain protection. Specifications Best Use Hiking, walking, trekking, trail running, fast packing Weight 40g Membrane PETRICHOR 3L20,000mm HHRET < 7 Materials Shell Face: 100% Nylon (recycled)Shell Backer: 100% Nylon (recycled)