The chainstay protector - many now make this product, but make the mistake of not developing it because of its simplicity. The use of high-performance neoprene prevents damage to the frame as it breaks through the chain. By attaching the Frame Sox close to the bottom bracket, the Frame-Sox can also protect the frame during the chain-suck. There is the right protection for every type of frame. Narrow for narrow steel and alluminium, Jumbo for fat alluminium bars and Super Jumbo for DH / Fullys.