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  • The dial-fit system tightens evenly around your body, so you can fine-tune the fit mid-run and reduce bounce without missing a step.
  • Includes a co-developed 575ml HydraPak UltraFlask with a locking cap, designed specifically to work for trail efforts.
  • The belt can fit up to two of the 575ml flasks, allowing you to carry over a liter of fluid with space for gels, your phone, and an extra layer.
  • B01's primary fabric is among the most durable in any belt, resisting abrasion and punctures while retaining next-to-skin comfort.
  • Front and rear storage keep your flask, phone, nutrition, and gear thoughtfully separated while providing multiple access points to each storage zone.
  • A water-resistant stash pocket protects salt tabs, a car key, or emergency cash.
  • An external zip pocket gives you quick access to the small stuff you don’t want to lose.
  • Rear pass-through sleeve securely holds poles or layers.
  • Weighs just 4.2oz in a size medium, disappearing on your run.

FAQ

Answers to most common questions about products, orders, shipments, and payments.
Capacity & Use
What can I fit in B01? Plus

B01 provides about 2 liters of volume. All sizes can accomodate two HydraPak x Dera 575ml bottles with ample additional space for gels, phone, keys, and more.

Where can I store poles or extra layers? Plus

The pass-through sleeve on the back of the belt is specifically designed to securely hold poles and layers.

Inside the sleeve are gripping elastic bands to provide a secure hold on your equipment while pull tabs at the bottom of the sleeve adjust to the amount of gear you're storing.

What kind of distances can I cover with the belt? Plus

The belt was tested on race courses from 11 miles to 62 miles in length. With over a liter of water capacity, the belt provides more fluid storage than most vests.

Shipping & Returns
When will my order ship? Plus

Orders placed before 4pm Pacific ship next day. Orders placed after 4pm Pacific within 48 hours.

Do you offer returns? Plus

Free returns are available for orders within the US. The belt must be in unused condition with original tags still attached and able to be re-sold.