I’ve used a few camelbacks and other hydration pack brands but the Send It pack is the best one I’ve used for mountain biking by far. My first time using it was during a 5 stage enduro race and it had enough storage for me to pack myself lunch, tools, and held enough water to keep me hydrated all 18 miles of riding. My favorite part about the pack was how well it fit, it didn’t hinder my riding at all and I didn’t feel any bounce even on the harsh roots and rocks through the course. I highly recommend this hydration pack to anyone who does long rides!