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The Ultrabag PRO 5L is an ultra light (195 g in S.M) and very stable (custom fit) hydration backpack with 7 pockets directly accessible.

The entire R&D team worked together with the WAA athletes to develop the lightest backpack of its category which will perfectly fit for women and men, could be beginners or experimented trail runners!

The new Custom Fit system allow a totally personalized fitting system for an unequaled comfort and an intact freedom of movement!

A lot of trail runners using classic backpacks are compelled to remove their bags to access their pockets, with all the inconvenient it has, including a big loss of time… The Ultrabag PRO 5L is accessible at 80% without removing it, thanks to the pockets optimally disposed for an easy, fast and safe access.


  • The lightest of its category: 195 g (in size S.M)
  • 80% accessible without removing it: 7 pockets
  • Adaptable to any kind of morphology: Custom fit system

11 pockets:

  • 2 hydration frontal pockets: bottles or flasks of 300 or 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

  • Ergonomy: improved freedom of movement thanks to the Custom fit technology
  • Personalized fitting: 2 or 3 fitting hooks for a perfect adjustment
  • Water-repellence: resists to humidity or to short rain showers (for perfect impermeability we recommend you to use freezer bags)
  • Breathability: interior light and breathable mesh
  • Visibility: 360° reflective bag
  • Adapted for sticks carrying
Votre évaluation

Find your size

Neck(PO) Armhole(PO) Waist(PO)

S/M 15 cm
6 inch
30 cm
12 inch
70 cm
28 inch

L/XL 17 cm
7 inch
32 cm
13 inch
76 cm
30 inch

How to measure

Women Bottom