USWE packs are my favorite. https://uswe.com/en-us/hydration-packs/biking After riding Camelbacks for 20 years, a friend recommended USWE and its a huge improvement in comfort. I only wear one when riding my MTB and the Camelback packs always come up and hit me in the back of the head, when hopping over logs. The USWE pack has a different shoulder strap system that keeps the pack in place without an additional strap around your waist.