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Lighter than ever !

The TOUR 25 Ultralight REACTOR is designed for backcountry enthusiasts looking for an ultra-lightweight avalanche airbag backpack that doesn’t sacrifice functionality on an all-day tour.

Learn more about our Reactor technology

Tax included
  • Carbon footprint: 38 kg CO₂eq (100% offset)
  • Single use plastic used: 21,3g


Designed for “Fast & Light” alpine adventures, the TOUR 25 UL REACTOR avalanche airbag backpack will serve you well for the most intense, physically grueling tours you have planned while still equipped with our REACTOR technology, the lightest, most compact high-performance airbag system on the market.

The revolutionary TOUR 25 UL REACTOR reflects ARVA’s vast experience in designing avalanche airbag backpacks. We broke with established norms to produce an extremely lightweight pack that does not skimp on function and safety.

Discover our REACTOR technology

Saving weight is not the only challenge that the TOUR 25 UL REACTOR overcame. With its unique aerated mesh structure, this pack fits like a glove, providing unparalleled freedom of movement. The elastic pockets placed on the waist belt provide immediate access to essentials like your gloves, beanie, skins, water bottle, or sun glasses. You’ll be surprised at how quickly you can grab what you need! Don’t worry about carrying your skis, snowboard, an ice axe or two, we planned for everything!

Choosing whether or not to take an avalanche airbag backpack on an outing has never been so easy. Now it’s a no-brainer!

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  • Quick access mesh pockets
  • Removable carry straps
  • Daisy-Chain
  • ROBIC REGEN recycled fabric
  • Reactor Airbag System
  • Quick access mesh pockets
  • Removable carry straps
  • Daisy-Chain
  • ROBIC REGEN recycled fabric
  • Reactor Airbag System
  • Quick access mesh pockets
    To save time during your backcountry adventures we equipped the shoulder strap and waist belt with mesh pockets.
    These elastic pockets provide quick access to all those essentials you need in a jiffy: your gloves, beanie, skins, water bottle, sunglasses,…
    The mesh pocket on the shoulder strap lets you stow a 500ml flask or a small water bottle for split-second hydration when you need it.
    1600 grams, including the REACTOR airbag system and the carbon-fiber canister.
    To reach this feather weight, we revamped our design and applied a minimalist approach without sacrificing safety or comfort.
    Through our new, innovative LOW PROFILE technology, we decided to completely revamp the design our REACTOR avalanche airbag backpacks by integrating the airbag into the pack itself.

    The latest generation of packs designed with our LOW PROFILE technology means a more compact size, enhanced load distribution, and new features like the option of carrying skis in an A-Frame.
  • Removable carry straps
    To save weight, the carrying features are limited to the strict minimum needed for most situations: a diagonal ski-carry system and 1 ice axe loop.

    When an adventure calls for more, use the removable straps (included) to carry your skis in an A-Frame, a snowboard, a second ice axe,…
  • Daisy-Chain
    Daisy chains are extremely useful and versatile, allowing you to strap a wide variety of gear to your pack depending on the outing and your immediate need.
  • ROBIC REGEN recycled fabric
    The very first polyamide fabric made with recycled thread, REGEN technology represents a genuine innovation for technical textiles
    Extremely waterproof and abrasion resistant, our high-performance, rugged N330D ROBIC REGEN fabric lasts much longer than traditional backpack fabrics.
    Weighing in at a mere 680g, our ARVA REACTOR avalanche airbag system is the lightest airbag system on the market, all categories combined. The two 75L airbags means a redundant safety system in the event of an accident.
    The most powerful airbag system on the market, the compact design and position inside the backpack guarantee a well-balanced load and an exceptional level of safety.


  • Bag only : 600 g
  • Bag with system : 1280 g
  • Bag + system + carbon canister : 1600 g
  • Bag + system + steel canister : 1770 g
  • Bag + system + US carbon cartridge : 58.2 oz
  • Bag + system + US steel cartridge : 63.84 oz


  • 27cm x 51cm x 17cm
  • Large capacity: 25L.
  • Equipped with the ARVA REACTOR airbag system.
  • LOW PROFILE airbag compartment.
  • Front access to main compartment.
  • Waist belt equipped with two large quick-access mesh pockets.
  • Two ice axe loops.
  • Diagonal ski-carrying system.
  • Removable straps for carrying skis in an A-Frame or diagonally, a snowboard, or snowshoes.
  • Daisy Chain system compatible with ARVA helmet holder.
  • Elastic support straps for safety gear.
  • Easy-access pocket for valuables.
  • Ultra-lightweight shoulder straps equipped with elastic pockets for a 500ml flask or water bottle.
  • Ultra-lightweight back panel with removable ventilated foam padding.
  • Removable emergency whistle.
  • Adjustable left/right leg safety loop.
  • Materials: Recycled polyamide 330D ROBIC REGEN lightweight, highly-durable fabric.
  • TUV GS certified.
  • Complies with EN16716 standards.
  • YKK zippers.
Lightweight and practical
Finally an ultra-lightweight avalanche airbag backpack that does not sacrifice functionality!
In addition to the classic front loader entry and the various essential carry options, the TOUR 25 UL REACTOR goes one step further by providing 2 large stretchy side pockets as well as a shoulder strap flask pocket.
You will always have the essentials within easy reach without having to take your pack off. A true time saver!
Arva Reactor Tour Ultralight
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