Volume Cobalt 18L Black / Grey Iron


Zip-On with a capacity of 18L, light and balanced, offering multiple equipment, adapted to the rides of a day.
Volume to be zipped on a Gravity Back base to compose the backpack.

In stock

What Our Clients Say
5.00 store reviews (82 reviews) | 4.71 product rating


Volume Cobalt 18 liters Black / Grey Iron

The Cobalt Black / Grey Iron volume is ideal for day trips (mountain biking, freeride or rando skiing, snowboarding...). Lightweight and very well balanced, it offers an excellent weight to volume ratio. Equipped with 4 compartments and multiple interior mesh pockets, it allows you to carry the essentials.

Technical specifications
Volume: 18 Liters
Dimensions: 54cm x 28cm x 18cm
Weight: Zip-On Co18 only = 425g / Zip-On Co18 + back protector + helmet holder = 1350g
Composition: Recycled Nylon / N210D Double Rip PU3 / N190T TAFFETA PU2 / N190T TAFFETA W/R PU (rain cover) / Mesh

Black / Grey Iron volume equipment

  • A YKK zip for fitting to the GRAVITY BACK base
  • An easily accessible eyewear pocket on the top of the bag
  • The main compartment with access to the back base
  • The front opening allows access to the compartmentalised mesh tool pockets
  • A pocket at the bottom of the volume with a rain cover and 37 cm straps
  • Access to the water bag slot (not supplied) on the base via a zip
  • Access to the back of the base


This 18 litre Cobalt volume is available in a variety of colours and can be combined with different coloured helmet/gear holders, making it a unique and personalised bag. Make your choice in our shop or visit your nearest PRISM dealer.

Fits on:
PRISM OFF ROAD Gravity Back Base since 2014. Compatible with both sizes S/M and L/XL and the E-HELMET helmet carrier.

Cannot be used alone

This product is guaranteed for 10 years


Further information

Colours (bag volume)


Colors (marking)

Grey Iron


Back-Acces Zipper (BAZ), Core Bottom, e-Helmet Compatible, Goggles Pock, Gravity Back Compatible, Hang Over, Main Comp 18, Rain Cover, Stuff Holder, Tools & Spares, Zip Double, Zip Fit Half


Climbing, Motorcycle, Hiking, Urban, Mountain bike, Electrically assisted mountain bike


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