Ultralight Breathability for Trail Running and Outdoor Training The Swift Ultra Light Cap is the ultimate trail running and outdoor training hat, featuring a hybrid-mapped, ultralight design with maximum ventilation for pushing the pace in alpine or on the road. The Swift Ultra Light Cap's hybrid-mapped design is made with an ultra-breathable bluesign® approved polyester blend on the top of the crown and 100% recycled polyester on the side panels. The cap is designed to be crushable and packable to stuff into pockets and packs, and the drawcord closure at the back delivers a secure, adjustable fit. DWR finish and UPF 30 protect from the elements, and just the right amount of movement-mirroring stretch provides a precision fit and all-day comfort. With a firm focus on ultralight breathability and ventilation for fast-moving, high-tempo outdoor wear, the Swift Ultra Light Cap epitomizes lightweight, technical trail running gear.