Colorful protection.nMake your Hydro Flask your own with a colorful, durable silicone Flex Boot. Customize your look and protect against bumps and dings.nnSmall boot fits 12-24 oz wide and standard mouth bottles.nIf your bottle is bigger than 24 oz, check out the Medium Flex Boot here!nnProduct Benefits:n- Removable, silicone boot adds extra protection to your Hydro Flaskn- Small boot fits 12-24 oz wide and standard mouth bottlesn- BPA-Freen- Lifetime Warranty