Lizard skins chainstay protectorconstructed with a tough and durable neoprene material and tightly sewn together, this chainstay guard from lizard skins is the lightest and strongest that's available. With this tough component wrapped around your mountain bike's frame, you can hit the trails hard without worrying about it getting damaged by the chain.reasons to buy durable neoprene material. Incredibly lightweight and strong. Prevents damage to your chain on aggressive rides.features sharkskin neoprene offers critical frame protection, dampening and a non slip texture length 280mm circumference fit 125 140mm large, 100 125mm medium, 70 100mm small weight 31g large, 27g medium, 21g smallbuy lizard skins frame protection from chain reaction cycles, the world's largest online bike store.