Ultralight, breathable cap providing for trail running in summer weather. The cap that completes your trail running kit. Made from a mini-ripstop stretch polyester, it's incredibly light, packable, breathable, and comfortable. The DWR (Durable Water Repellent) treatment helps minimize moisture pick-up.  The headband adjusts with a single pull for a secure fit, and reflective elements add low-light visibility. Our lightest, most compact hat, it wears under a helmet or hood.