The Sierra Designs Flex Capacitor 40-60 is a lightweight, functional and well-designed backpack. It is a versatile carrying solution for hikers who want a backpack for multiple uses: hiking, trekking, mountain...

This backpack has an aluminium frame for a better carrying comfort. It is equipped with a padded back at the support points with the body, padded shoulder straps and a wide hip belt. It combines lightness and comfort.

The Flex Capacitor 40-60 features an intelligent design that allows you to vary the volume from 40 to 60 litres while maintaining a snug fit. Compression straps allow for increased storage capacity. This feature gives the Flex Capacitor 40-60 great versatility.

Accessories :

• The bag opens at a zippered top flap with a zippered pocket for storage of small items.


• The hip belt has large pockets for a phone, keys or a few cereal bars.


• On the sides, 2 soft pockets offer additional storage space.


• Inside, you can slip your own hydration system into a removable pocket (the passage for the supply hose is provided).


• On the right shoulder strap, a soft pocket allows you to slip a bottle/gourd giving you direct access to your drink.