The UltraBag Pro 5L is the lightest bag in its category with 195g.

The new Custom Fit system allow a totally personalized fitting system thanks to 2 or 3 adjustable hooks for a perfect adjustment, an unequalled comfort and an intact freedom of movement!

The flasks have an easy opening for quick refuelling and easy cleaning. They have been especially developed with no angle in order to resist the most demanding conditions and avoid any breakthrough, and the composition in BPA and PVC FREE guarantees a neutral taste.

11 pockets:

  • 2 hydration frontal pockets: flasks of 500 mL
  • 2 zipped chest pockets: nutrition, music player, etc.
  • 2 zipped lateral pockets: keys, mobile phone, nutrition, etc.
  • 2 lateral pockets: wastes
  • 1 top back pocket directly accessible: rain jacket
  • 1 double zipped main back pocket: voluminous equipment
  • 1 water-repellent back pocket: headlamp

This bag has water-repellence so it resists to humidity or to short rain showers. For perfect impermeability we recommend you to use freezer bags.

The mesh is light and breathable.

It’s a reflective bag for a 360° visibility and is adapted for sticks carrying.

Total weight: 279g (195g for the bag and 2x42g for both flasks).



The UltraBag Pro 5L is an ultra light (195g) and very stable hydration backpack with 11 pockets, 7 of which are directly accessible.

The WAA Ultra team worked together with its brand ambassadors to develop the perfect backpack that fits for women and men, beginners or experimented trail runners!

The UltraBag Pro 5L includes 2 Ultra Flasks 500mL to put on the frontal pockets.

With 7 pockets out of 11 directly accessible without removing the bag, save time and energy thanks to optimal organized compartments.

Additional information


Yellow, Grey


S / M, L / XL