The Karrimor ReFuel 15+2 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 comes in different sizes and the 15+2 litre one has enough space for all your outdoor essentials including a front mesh pocket that is ideal for your helmet or for stuffing extra layers in and offers a lightweight and comfortable carry thanks to the coolmesh contact and ReFuel ventilated back system making it great to take with you when you are enjoying outdoor activities