Snap closureATTENTION: It is critical to purchase this item ONLY from Triple Clean. Do NOT buy from OEM Shop or anyone else who has hijacked this listing. They do not have this hat. This cap is only being offered by Triple Clean.50% Cotton/50% Poly/Snapback/This cap exactly like the one worn by Dustin in the movie Stranger Things. Extremely high quality, great fit with adjustable polysnap.