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The EVOLUTION 7L will take you from 20km to ULTRA distances!

The ultimate minimalist solution for Ultra distance racing. Extreme versatility and minimal body contact.

  • Volume: 7L
  • Weight: 210g 
  • Size: One Size

Compact, light & breathable, the EVOLUTION goes unnoticed. Extendible, its volume varies and responds to the requirements of an Ultra. Whether it be water bladder, bottles, or soft flasks, the choice is yours.

High sitting, the EVOLUTION allows immediate & easy access to hydration, feed, poles & adjustments.

Adjustable front sternum straps and our unique side elastic lacing system allow for a custom fit to almost any body type. Discover stability, liberty of movement, immediate access to storage and unconstrained breathing.

Optimal positioning of pockets & adjustments for natural, effortless & intuitive access. Lightweight & breathable honeycomb mesh ensures ventilation and sweat dissipation without sacrificing strength or reliability.


  • 2 x 650ml hydration pockets + elastic compression cords with auto lock. Sits high for immediate and effortless access.
  • 2 x 500ml feed storage pockets + internal elastic cord : extra large storage and easy access (right: 1 zipped pocket // left: 1 overlaying pocket).
  • 1 x 100ml shoulder pocket + non-stretch internal cord ring + whistle + elastic for upper pole attachment. Pocket for your safety essentials and more


  • 1 x 800ml top horizontal pocket + elastic compression cord with auto lock. Easily access your rain gear right from the first drop without removing bag!
  • 1 x 1.5L bottom horizontal pocket. Central access to safety kit, headlamp(s), gloves, arm warmers …
  • 2 overlapping vertical pockets totalling 1.5L + closing buckle + velcro strap. Double main compartment. Water bladder compatible 1.5L.


  • 4 carrying options. Front: vertically right & left // Back: horizontally, vertically or diagonally.


  • 2 adjustable chest straps mounted on 20cm sliders = custom fit vertically and horizontally
  • 2 double “S” elastic cross-lacing with auto lock: “on the fly” side adjustment!
  • 1 elastic compression cord with auto lock for top back pocket.
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      Select Type: EVOLUTION 7L
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      About Instinct

      Born on the trails of the French Alps and race approved around the world.

      Redefining a hydration pack comes from asking the right questions... introducing analytical observations & first hand experience in running the toughest conditions. At the heart of each revolutionary Instinct product is the desire to achieve a greater degree of function, accessibility and ergonomics; Total liberty of movement, zero obstruction and a second skin fit.