Osprey Hydraulics Reservoir - 3L - Blue Heavy/Bulky The high vent foam straps

The high vent foam straps have an ergonomic fit and the chest straps stretch to allow unrestricted breathing and freedom of movement

with a  1:1 shifter to derailleur actuation ratio shifting

Chain retention:Adjustable slider with co-molded soft rubber for sound reduction

Cons: Might be too basic for some riders

3-hours running time

Osprey Hydraulics Reservoir - 3L - Blue Heavy/Bulky The high vent foam strapsOspreys Hydraulics 3L Reservoir by Hydrapak is ideal for large volume packs and long duration activities. The HydroStatic backplate provides a 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