The zensah skull cap beanie is an ideal addition to any runner's, cyclist's, or athlete's wardrobe. the skull cap beanie is made from unique zensah fabric. it is ideal for cyclists to wear under a helmet, runners to wear to help keep warm, or any athlete looking to preserve body warmth in the winter. the skull cap beanie is also able to be used in the summer. unlike other beanies, the zensah skull cap beanie features moisture wicking technology to prevent it from becoming damp and heavy.