Run Cap. Made for everyone looking for an efficient sun protection when running in good weather conditions. The run cap offers all the basic features and a variety of styles to choose, in sports style. Comfortable fit, fit for everyday use. Protection is vital when running in the sun. Our line of running caps and visors has been specifically designed to provide protection and fresh looking style. Made for comfort and performance, the BUFF® Running Caps offer protection against harmful ultraviolet radiation while keeping the sun away from your eyes. Latest technologies and appealing designs get together in ultralight, highly breathable and extremely appealing caps. Design: Patterned. Size: One size. Designed for adults.