3 layers of protection Extra Reinforcement Top Layer: 600D Nylon 2nd Layer: 20mm shock-absorbing foam 3rd Layer: Tarpee lining Compression straps External and internal Protects boards by minimizing movement inside the cover. Shoulder strap 20mm padded detachable strap. Stashes into storage pocket. Heavy duty zippers Large, lockable zipper heads. Extra security for your boards. Skid plate Reinforced fabric skid plate to protect board tails / rails. Double thick gusset padding 20mm shock absorbing foam. The thickest rail protection on the market. Sizes: 6’6” x 23” 7’0” x 23” 7’6” x 24”