The karrimor refuel 22 daysack is a lightweight hydration bag designed for running cycling and walking and comes with a 2 litre hydration system to ensure that you are kept hydrated while you are on the go the refuel range is available in different sizes and this lightweight 22 bag has an incredibly useful zipped main compartment with an organiser pocket and an inner zipped pocket it also has a mesh helmet holder stowed away in the base making it ideal for your next outdoor adventure