WATERFLY Professional Outdoor Sport Climbing Mountaineering Backpack Shoulder Bag Camping Hiking Rucksack Daypack with Waterproof Cover For Biking Cycling Traveling Camping Climbing (Blue, 50 Liter) Made of best Nylon, with SBS Zippers, high quality and durable, better ventilation not easy to deformation, can carry 50 kilograms weight Stuff. Five Years Guarantee! Reflective line on the Backpack, more safely in the Night, with lifesaving whistle and Large bearing capacity, Super versatile and multi-functional pack. Unique design straps ease the pressure on the shoulder, and The cushion with high permeability material, have never cover the sweat when you carry it a long time WATERFLY professional Backpack is ideal for various activities such as Climbing, Hiking, Holidays, Trveling and so much more. With Waterproof Cover can protect your stuff from the rain, have big room for a laptop / notebook up to 15.6 inch, laptop charger, mouse, your iPad, mobile phone, A4 documents, books, magazines and other accessories