Ideal for hikers, paddlers, and backpackers, our Thunderhead Cap provides System Three waterproof protection and breathable comfort in wet, miserable conditions. Lightweigh, yet durable nylon ripstop fabric with DWR (durable water repellent) finish. System Three PU (polyurethane) coating is waterproof and breathable???keeps rain out and allows sweat to escape, so you stay dry and comfortable. Taped seams keep rain from seeping in. 2.5-layer construction: Nylon ripstop backed by System Three with .5 layer to protect coating (no separate lining). Soft polyester mesh headband wicks moisture. Elastic loop, nylon webbing, and quick-release buckle at back provide a secure, adjustable fit. Reflective piping along brim edge for low-light conditions. Stiff precurved visor. Packs down small for stowing. Opening circumference: 22.75 in.. Brim depth: 2.75 in.. One sizeImported.