... buyer's demand such as AZD-Free material,Canvas,Polyester,Acylic etc5. Back ClosureVelcroBrass,Plastic, ,Velcro,Metal ... cap, trucker hat, knitted hat, fashion hat ,army/military cap.Pre-sale serviceAdvise OEM/ODM.(Cap/hat Designer ... Polyester(cheap) – mainly for snapback hat , baseball capAcrylic(cheap) – mainly for snapback hatCotton(brushed ,washed ,twill) – baseball capLinen – fashion army/military ...