Nike AF1 Vac Tech Snapback Cap - Men'sFeaturing a flat brim and 3-D graphic, the Nike AF1 Vac Tech Snapback Cap delivers a throwback vibe that pays tribute to the history of hoops. An adjustable fit provides custom comfort. Sz: One size fits most. Front/Brim: 100% polyester. Back of front panel: 80% polyester/ 20% cotton. Imported. One size fits most.