An ultra-lightweight, windproof skull cap, ideal for wearing under a cycling helmet. Polyester and nylon blend is moisture-wicking, helping draw perspiration away from the wearer. Head will remain dry and aerated. Under-helmet cap offers UV and wind protection, two of cyclists’ biggest adversaries. A cycling essential. Suitable for a range of sports requiring headgear protection – skiing, snowboarding and motorcycling. In need of a waterproof cycling cap? Try the Trunch.