Offering extra protection and grip for your Hydro Flask bottle, the Medium Flex Boot is compatible with 32 and 40oz Hydro Flasks. For 12-24oz bottles check out the Small Flex Boot here . Hydro Flask Medium Flex Boot features: Removable, silicone boot adds extra protection to your Hydro Flask Medium boot fits 32 and 40 oz wide mouth bottles BPA-Free Lifetime Warranty
