Reproduction OD 7 US WWII infantry chin strap set with flat buckle mid-war hardware for the M-1helmet. This chin strap set is made from new production, 100% cotton, yarn dyed olive drab #7 webbing. It has the correct 11 row chain pattern. The J hook is durably set and sewn down with a proper bartack stitch. Perfect for any US WWII M-1 infantry helmet shell.