Hydration MTB Enduro Race 1.5When all you need is to stay light and hydrated, this is what you need. Our MTB Enduro Race 1. 5 backpack allows you to carry up to 3. 5L of water and fluid in two separate bladders. The 1. 5 horizontal bladder is standard but you can also add a 2L vertical bladder and route it down the other shoulder for maximum hydration during a long race day! The heat reflective back panel will keep it cool so you can stay fresh in the hot sun. Our signature chest