The Mammoth x DERA Running Belt

$120.00

Born from our local run club, Morgan launched the world’s best belt. No bounce. All style. This limited edition collab with The Mammoth will memorialize our class of 2026

  • 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.

Size:

Born from our local run club, Morgan launched the world’s best belt. No bounce. All style. This limited edition collab with The Mammoth will memorialize our class of 2026

  • 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.