Our Whoppin Shirt in Bison Check Ranch Cotton. Produced in an Italian cotton twill with our developed buffalo check, the dense twill is designed to endure, softening gradually and developing a lived-in patina with wear. The men's Whoppin Shirt has a shorter, boxy fit with a curved hem and a stone-washed finish for a compact, vintage character. It features two chest pockets and corozo buttons.