SOLAR HYDRATION BACKPACK SOLAR HYDRATION BACKPACK,THE LATEST INTEGRATED DESIGN INTEGRATED THE FUNCTIONS OF SOLAR CHARGING,POWER STORAGE AND VOLTAGE OUTPUT.MEANWHILE,THE PRODUCT ... .SOLAR PANEL POWER:1.35W-4W(SPECIFIED BY THE CUSTOMER)CHARGING TIME:1-7HOURS,weight:200g,MATERIALS;1680D DOUBLE-STRAND PU ... WEBBINGITEM SIZE, 41X20X9CM,20PCS/CTN(50X38X40CM,11/10KGS) SOLAR HYDRATION BACKPACK