Chain slap won't mar your frame if you use the Lizard Skins Large Neoprene Chainstay Protector. Designed and made in Lizard Skins' Utah facility, their chainstay protector is made with neoprene and sewn with a tight stitch and heavy-duty thread for extra strength and durability. Lizard Skins chainstay guards are the original, strongest, and lightest protectors on the market since 1993. Features: Sizing system for 26", 27.5" and 29" wheeled frames Neoprene sewn with heavy-duty thread is extra-strong and durable Size small designed for chainstays 70 to 100mm in circumference Size medium designed for chainstays 100 to 125mm in circumference Size large designed for chainstays 125 to 140mm in circumference Specifications: Length: 280mm (All Sizes) Color: Blue Weight: 21g (S), 27g (M), 31g (L)