ﾃ｢ﾂ慊認OR 40L-55L BACKPACK: 70*45 cm (27.3*17.5 inch), Full stretch 85*50 cm (33.1*19.5 inch);ﾃ｢ﾂ慊祢NCREDIBLE DURABLE: Made of 300D Nylon features wear-resisting, durable and water resistant (pu5000mm).;ﾃ｢ﾂ慊捻ROTECTOR AND COVER: Protecting your backpack from rain, sand, snow while keeping your belongings dry.;ﾃ｢ﾂ慊妊OUBLE CONSTRUCTION: External fabric is nylon that protecting your backpack from scratch, dirt, sand and internal fabric is waterproof coating that keeping off water, heavy rain, frog and snow.;ﾃ｢ﾂ慊任USOMER PROITY GUARANTEE: 90-day money back guarantee, 2-year warranty and 24-hour customer service.