FreeKnight Professional Waterproof Outdoor Sports 40L/50L Shoulder Bag Backpack Rucksack Daypack For Biking Cycling Traveling Camping Hiking Climbing Made of best Nylon, with SBS Zippers, high quality and durable, better ventilation not easy to deformation, can carry 50 kilograms weight Stuff 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 Freeknight professional Backpack is ideal for various activities such as Climbing, Hiking, Holidays, Trveling and so much more Ultra-comfortable. Ultra-durable. Ultra-awesome. This backpack is perfect for day-to-day use or occasional ourdoor travel, and great gift for everyone