Designed and made in our 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 70-100 mm (S), 100-125 mm (M) or 125-140 mm (L)Weight 21 g (S), 27 g (M) or 31 g (L)Length 280 mm