Light Weight Backpack Bags Men Ultralight Outdoor Sports Hiking Travel Camping Climbing Pocket Hiking Rucksack [Material]: Nylon​ [Feature] 1.Durable, Waterproof, Portable and Wear-resistant nylon material. 2.Large-capacity design can accommodate your daily necessary, such as wallets, mobile phones, key chains, kettles, earphones, mobile power supplies, glasses, etc. 3.Front elastic rope design 4.side water bottle stroage pocket 5.Servival whistle on chest level belt 6.waist level adustable buckle [Application]: Suitable for outdoor activities such as fishing, hiking, camping, cycling and hunting. Note: ​ 1.Manual measuring, please allow slightly measurement error. ​ Due to the difference between different monitors and lighting effects, the actual 2.color of the item may be slightly different from the color shown on the picture.