The F3 e-hydration pack range offers both static and removable designs with 1 Ltr and 1.5 Ltr options. All made with weatherproof zips, dual compartments for that all important MP3, smartphone or other valuable items plus a wide opening hydration bladder on the other side of the pack.Both compartments allow neat exits for both headphone wires and hydration tube. Coupled with breathable mesh shoulder straps and fully adjustable to perfectly fit your body shape, you will forget it is even there. As with all eGlove products, these have been heavily tested and praised in 100 mile cycling sportives, upon the mountain and many endurance running events.