OGIO Erzberg 35 Hydration PackWater sustains you, but you don't always need to carry a full 3 liters of it. Each liter tips the scales at 2.2 pounds. Why carry 6.6 pounds and a pack big enough to transport it when you can make do with less? Less weight means more of your bike's power can be devoted to going fast. Less bulk means you're more limber for exerting better body English with less fatigue. TheOGIO Erzberg 35 Hydration Pack keeps you fueled with 1 liter (35 oz) of fluid and the pack hugs you tight like a bionic organ that's a part of you.Features: Dual Triangulated E-band waist strap for a comfortable fit Insulated bladder compartment 35 oz / 1 liter bladder Quick-cooling air mesh back panel Separate storage compartment Dimensions: 11 H x 9.5 W x 1 D Capacity: 185 cu. in./3 liter (includes bladder) Weight: 0.9 lbs./408 g (excludes bladder) Fabric: 150-denier mini honeycomb rip stop with TPE backing and 420HD Oxford nylon with PU backing