Duck Camp Men's Blue Crab Adjustable Hat - Anyone else suddenly get really hungry for a crab boil? Polyester shell fabric keeps this hat looking good season after season; 5-panel structure; Adjustable snapback; Cap sizing: max size of snapback hat is approximately 23 1/2in circumference with a 5in crown; 100% polyester shell; 100% cotton rope; Style: GH3714;