Nike Men`s Roger Federer "RF" Hybrid Tennis Cap Night Factor/Red 371202-320 Color: Night Factor with Crimson Red 371202-320 Dri-FIT 58% cotton/42% polyester fabrication to keep you cool and adds function to the fashion. 3-D embroidered RF logo at front, while Federer is embroidered on the back. Sizes: One Size Fits Most. A velcro strap makes this hat adjust to fit most people. Limited Edition for Spring 2014