Joe's USA Mesh Back Flex-Fit Trucker Style Caps in 8 Colors Joe's USA(tm) Mesh Back Flex-Fit Trucker Style Cap Printed with Joe's USA(tm) Logo Inside. An ultra-breathable cap with the patented Flexfit stretch for a comfortable fit. A silver contrast underbill adds character to this trucker-style cap. Fabric: 55/43/2 poly/cotton/spandex Structure: Structured Profile: Mid. Closure: Stretch fit Printed with Joe's USA(tm) Logo Inside. Adult Sizes: S/M, L/XL