The Trucker Cap features a classic design with an open back and adjustable strap, while the slight curved brim provides sun protection during long days outside. One size fits all, making it a versatile addition to any outdoor outfit, perfect for days on and off the wall. One Size Open back/adjustable Slight curved brim Material: Fronts and Visor - Cotton Twill (97% Cotton, 3% Elastane), Middle and Back Panels - Polyester Mesh (100% Polyester) _