Hydraulics 3L Reservoir 7 x 4 x 5 in / 18.5 x 9.5 x 13 cm making it an easy addition

making it an easy addition to any pack

It has a built-in storage pocket with instructions printed on the outside for fool-proof anchors

Use it as a neck-warmer

Reinforced brace zones for easy attachment of braces

wire core temples

Hydraulics 3L Reservoir 7 x 4 x 5 in / 18.5 x 9.5 x 13 cm making it an easy additionOspreys Hydraulics 3L 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