When you're grinding out miles on scorching summer trails or pushing through interval training on the track, the Outdoor Research Swift Air Cap delivers the lightweight protection serious runners demand. At just 48g, this performance running hat features strategic mesh ventilation panels that keep your head cool while UPF 40 sun protection shields you from harmful rays during those long training sessions. The internal TransAction™ headband works overtime to wick sweat away from your eyes, maintaining clear vision when you're deep in the pain cave, while the flexible brim packs down small enough to stash in your running vest for ultra-distance events. Built with bluesign® approved recycled materials and a quick-release buckle system, this trail running essential proves that high-performance gear doesn't have to compromise on comfort or environmental responsibility.