Hydrapak's UltraFlasks™ are designed to conform to the shape of your body, compressing as you drink. This means reduced sloshing and bouncing, less spillage and an easier time sucking out that Tailwind goodness.

The flexibility of the soft flask means it can fit into your existing gear: successfully tested with Ultimate Direction, Salomon and Nathan vests.

Featuring:

• Clear Plastic - no more guesswork towards the amount of Tailwind left
• Collapsible - Perfect bottle to use on multi-stage events or international events, it's only as large as the Tailwind being carried
• Lightweight - weighing in at just 38g once emptied the flask is light as a feather
• Pliable - Conforms to any shape, be it your hand, belt or high-tech vest. More comfortable to carry than a rigid bottle.

There are three size options:

500ml

For those of you who, like me run with a vest with 2 pockets for flasks these are ideal.  Fill one with a stickpack or 2 scoops of Tailwind to be consumed in an hour and fill the second with water which is drunk to thirst. 

There are 2 choices, WMX which we have been supplying for years and RMX which, with the same capacity, is longer and slimmer for vests which have narrower pockets, like some Salomon.

200ml

A smaller Tailwind Soft Flask which can be used for carrying a concentrated Tailwind mix (4 scoops or 2 stickpacks) to be carried in your hand, pocket or waistbelt.  A concentrated mix is great for a half or full marathon where it can be consumed alongside water from aid stations. You can also use this flask to carry Tailwind powder from a multipack for making up during an event. The smaller flask has a twist/lock top so it can be safely carried in a pocket, pack or belt without leaking.