Osprey Hydraulics Reservoir 90s The air pockets between the

The air pockets between the buckwheat hulls permit airflow to keep you cool

Find your way back to your starting point with the TracBack® feature

"The how of Pooh

This version

Osprey Hydraulics Reservoir 90s The air pockets between theOspreys Hydraulics Reservoir by Hydrapak is ideal for large volume packs and long duration activities. The HydroStatic backerplate provides structure for easy loading into a full pack and maintains a flat profile. Thoughtful design makes filling, cleaning and most importantly staying hydrated on the trail easier than ever. All parts are BPA free, phthalate free, lead free, guaranteed. All materials are certified food safe according to FDA and EU