Designed and made in their US facility the 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.Circumference 70-100mm (small) 100-125mm (medium) or 125-140mm (large).Weight 21g (small) 27g (medium) or 31g (large).Length 280mm.