Photo 1 of **FIT SIZING MAY DIFFER*** Boot for Hydro Flask 32 oz 40 oz, Thermoflask, Iron Flask, and the 32-40 oz water bottles (bottom width 3.5"-3.6"), Black

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Photo 1 of **FIT SIZING MAY DIFFER*** Boot for Hydro Flask 32 oz 40 oz, Thermoflask, Iron Flask, and the 32-40 oz water bottles (bottom width 3.5"-3.6"), BlackPhoto 2 of **FIT SIZING MAY DIFFER*** Boot for Hydro Flask 32 oz 40 oz, Thermoflask, Iron Flask, and the 32-40 oz water bottles (bottom width 3.5"-3.6"), Black