The Hydro Flask Flex Boot is perfect for extra protection against drops and dings as well as a way to customize. The Medium fits 32 40 oz. wide mouth Hydro Flask Bottles and the Small fits 12 24 oz. Standard Mouth Bottles.
Removable, silicone boot adds extra protection to your Hydro Flask BPA Free
Small boot fits 12 and 24 oz. wide and standard mouth bottles Medium boot fits 32 and 40 oz. wide mouth bottles