Lightweight, durable and designed in collaboration with the world's best ultra runners, the Flight Ball Cap has mesh side panels, a pocket for ice and reflective logos to enhance visibility at night.Features Classic fit—an all-around classic fit that’s not too tight for maximum comfort Pocket at crown holds ice Reflective heat transfer TNF™ logo on center front and Flight Series™ logo on back for enhanced visibility Specs Mesh Side Panels, Back Pocket And Liner: 84% Nylon, 16% Elastane With FlashDry™ Sizes: One Size Front And Top Panels, Brim And Back Adjuster Strap: 93% Nylon, 7% Elastane