Joyfully lightweightAdd a little more protection against bumps and dings with a boot exclusively for the Lightweight collection. We’ve overhauled our boot sizes to ensure a perfect fit and make it easier for you to mix and match. Check the size chart to ensure a great fit. This boot only fits 32 oz & 40 oz Lightweight bottles.Fits 32 oz & 40 oz Lightweight bottlesSee Fit Chart for current sizing.Removable silicone boot adds extra protection to your Hydro Flask bottle.Perforated for lightweight protectionBPA-FreeDishwasher safeNot for use on a stove in a microwave or freezer.This boot will not fit other similar-sized Hydro Flask bottlesFor Required California AB1200 Disclosure Click Here