Hydrapak Ultraflask Speed 500ml neck cooler This product uses a weight-based

This product uses a weight-based dosing system to better match the energy and protein needs of different body sizes and training demands

Additionally

cushioned running shoe that’s got your back (and your feet)

Weight: 277

Promotes flexibility

Hydrapak Ultraflask Speed 500ml neck cooler This product uses a weight-basedDescription Part of Hydrapak's ultra light series; the 500 ml is so light; you might forget you brought it. Weighing in at just over an ounce; its optimal hydration; no matter what kind of runner you are. Its pliable material conforms to most pockets; it shrinks as you drink to minimize water movement and it can be used with or without the tube. Topped with a new feature; the SpeedFill cap; makes aid station refills a breeze. Ultra light weight; ultra