HydraPak Ultraflask+ Flask Filter System Men's Shoes the Core Tank instantly elevates

the Core Tank instantly elevates your style – and your stride

Ethically-sourced merino wool feels super-soft against the skin

Say "sore-y

FF BLAST™ PLUS cushioning and PureGEL™ technology are strategically positioned in the midsole

HydraPak Ultraflask+ Flask Filter System Men's Shoes the Core Tank instantly elevatesLighten your load and drink right from the source. We took our go to flask and added filtration to create a system that delivers hydration without contamination. The filter light and compact screws on top so you can drink right from the flask. Or if youre carrying more water use the system to fill a bottle or reservoir.