An updated recycled poly provides a rugged and sustainable outer on this narrow, lightweight pack with two liters of vertical hydration. The pack provides plenty of storage including an organized front pocket, a fleece-lined pocket for sunglasses or phone, additional side pockets, plus external attachment straps. The Session is a do-it-all bike pack to keep you pedaling all day.Key Features:Women's Specific Fit 2L / 70oz Hydrapak reservoir Phaser bite valve Breathable Air Flow backpanel andshoulder straps External attachment straps Fleece lined sunglass pocket Internal organizer pockets Safety light attachment Integrated rescue whistle / sternumstrap 100% 450d ripstop recycled polyester (TPET) exterior 488 cu. in. [8L] 15.5x8.5 x 4" [39 x 22 x 10cm] 1.2 lbs. [.5kg]