Our Shell Sack is made from 18 oz., Industrial Coated, Fire-Retardant Vinyl. It is Waterproof, Self-Extinguishing, Anti-Mildewing, and UV & Cold Crack Resistant to -30 Degrees F. This fabric meets NFPA 701 requirements for Fire-Retardant materials. All seams are Bonded together & will not tear or split. It is then secured with stainless steel riveted snaps that never touch the Shotgun or your face. So you get a soft-to-the-touch cheek rest, plus a shell catcher all in one. $50. plus $10 for S&H To order for the KS7 https://square.link/u/N94jeaiB To order for the KSG 410 https://square.link/u/LuutTcOR OR go to https://www.shellsack.com