This FLEXFIT NASA Meatball embroidered iron on patch snapback trucker mesh cap is constructed with high quality fabric for ultimate comfort. 6 Panel Constructed. Rear Mesh Backing for more breathability. Hard buckram. Matching undervisor. 8 rows of stitching on visor. Features an adjustable snap closure on Back. 25% Polyester / 47% Cotton / 28% Nylon. One Size Fits Most.