Price: $ MSRP: $


Model Number:

The updated UltrAspire Proton is a unique running hydration belt design with 2 low-profile, rectangular 16 oz ergonomic bottles in-rear and a simple belt hook system replacing the traditional snap buckle. Sweat proof webbing keeps weight down and more breathable mesh enhances long-distance comfort; an open mesh pouch holds gels or keys and a sweat proof magnetic pocket stores electrolyte capsules. What else? The rear shock cord can stash a shell jacket, warmers or gloves.


  • UltraRed/Grey (RE)


  • Includes 2 Human16 oz ergo angled bottles; 32 oz total
  • Sweat proof webbing prevents pack from absorbing moisture and getting heavier as you run
  • Larger holes in mesh enhance breathability to keep you cool while also decreasing pack weight
  • Low-profile, rectangular bottles sit close to body
  • Angled, molded bottle holsters for easy grab and return
  • Padded, breathable mesh back panel for comfort
  • Adjustable belt with speed hook design; no irritating or uncomfortable snap buckles
  • Open mesh side pouch for gels, keys or other small items
  • Magnon Electrolyte Pocket™ with simple magnet closure for electrolyte capsules
  • Rear shock cord stores shell jacket, warmers or gloves
  • Weight: 13.0 oz (370 g) with empty bottles

Bottle Details

  • Human16 oz, ergo angled bottles
  • Rectangular bottle design sits close against body
  • Leak-proof, push/pull nozzle
  • Fills easily with wide mouth opening
  • Crystalline™ plasma silicon oxide coating for better taste, easier cleaning and durability; FDA approved
  • Polarity system™ magnet at bottom
  • Low Density Polyethylene (LDPE) construction
  • BPA free

More From Running Double Bottle Waist Packs: Large Bottles

Customer Reviews

Comments: Got this a few weeks ago. At first there was some bounce but after a little adjusting it is great. Never liked hydration belts but now love it. Thanks RunningWarehouse for the great service and having all these great products.
From: Dave, East Northport, NY