Our Session series of bike hydration packs has become such a staple we’ve designed a model specifically for youth. This minimal, yet fully featured pack combines the cooling comfort of a breathable Air Flow back panel with breezy shoulder straps to keep you dry. 2L / 70 oz. Hydrapak reservoir, Phaser bite valve, Internal organizer pockets Breathable Air Flow backpanel and shoulder straps, External attachment straps, Fleece lined sunglass pocket Safety light attachment, Integrated rescue whistle/sternum strap