Ultra™ Belt


For hands-free hydration, our lightest hydration belt stores a 17-oz Quick Stow flask with soft walls that mold to the shape of your body. The 3D mesh material stays light and breathable on even the hottest runs, and the extra stretch pocket keeps gels, keys and cards safely tucked away. Plus, you won’t be stuck carrying a big empty bottle at the end of your run—once the flask is empty, just fold it up and tuck it away.
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Standard UK Delivery - £6. Free shipping for all orders of £50 or more.
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  • Collection Running
  • Activity Run
  • User Unisex
  • BPA/BPS/BPF Free: Yes
  • Dimensions 9 x 78 x 6.5 cm / 3.5 x 30.7 x 2.6 in
  • Hydration Capacity 500ml/17 fl oz
  • Hydration Type Quick Stow™ Flask
  • Gear Capacity 0.5L/30 cu in
  • Pack Weight 100 g/0 lb 3 oz
  • Fits Waist/Hips XS/S: 66 - 96 cm/26 - 38 in M/L: 86 - 116 cm/34 - 46 in
  • Waist Belt Ventilated 3D Mesh
  • Accessories Included Quick Stow flask
  • Number of Exterior Pockets 2


  • 17oz Quick Stow flask is lightweight, collapsible and features our classic one-piece silicone bite valve for rapid hydration
  • 3D Ventilated mesh offers multi-directional air flow and cushioning to maximize comfort and breathability
  • Zippered phone pocket conveniently located for quick access and storage
  • Reflectivity for early morning or evening runs
  • Adjustable waist buckle for custom fit

Leak Proof on and off Lever

The leak-proof On/Off lever helps prevent drips and leaks while your flask is stored away and also lets you control the amount of water you want.

Quick Stow Flask

This lightweight flask collapses to fit easily in a running vest, belt, or even your hand. The jet valve self-seals to eliminate drips and leaks.