When we need a hydration pack that stays out in the roughest terrain, USWE pack are the first that come to mind. The USWE MTB Hydro 12 Hydration Pack is a lightweight hydration pack designed for most types of mountain riding as well as gravel riding, and features USWE's signature No Dancing Monkey 1. 2 harness system for a bounce-free fit. This pack comes with a 100oz hydration pack so we can always stay hydrated on the trails, and multiple pockets, including a quick stash pocket and a dedicated gear pocket stores all our essentials for a long day out on the trails.