Osprey’s Rev line of hydration packs is designed specifically for endurance sports, focusing on comfort and accessibility. In order to move with the athlete, Rev packs are intended to fit like a shirt and are pulled on like a vest, with dual sternum straps to adjust first before cinching down the shoulder harness and waist belt.
“Biostretch,” the stretchy mesh fabric in the harness and belt, conforms to the body to keep contents compressed and in the proper position, sitting higher on the back than most packs. Materials in the back panel are also flexible and soft with a mesh cover for breathability.
Baffles inside the 2.5-liter hydration reservoir prevent water from sloshing around inside the hydration compartment. The hose has a quick release connection so there’s no need to remove the bladder from the pack to refill it on the fly and the bite valve connects magnetically to one of the sternum straps to keep it in place.