Come and see our amazing products. Made of Water Resistant Nylon, as professional office laptop backpack, slim USB charging laptop backpack. The 18 Liter Backpack fits most 15.6" laptops, the water bottle sleeves fit up to a Water Bottle. The backpack is perfect for indoor/outdoor activities. Served as a durable laptop backpack, large school backpack for Teen Boys/Girls, large laptop bag or spacious college backpack. A luggage strap allows backpack fit on luggage/suitcase, slide over the luggage upright handle tube for easier carrying. Breathable and adjustable shoulder straps relieve the stress of shoulder. Great gift idea for your next powerful promotion. Pls confirm further with us if any query about packing info, inventory status and time schedule.