The latest Rihanna-spearheaded collaboration with Puma challenges typical school uniform separates with the singer's coveted brand of cool edge and sports-centric credibility. This green and navy plaid baseball cap is a more subtle accessory from the collection - let it dress down high fashion looks or add ease to denim and sneakers. 43% Polyester, 36% Wool, 21% Viscose, Sizes: One Size