Marca West 40L Outdoor Waterproof Camping Cycling Hiking Climbing Backpack Daypacks Mountainering Travel Bussiness Trip Trekking Bag Satchel nylon Material:waterproof high quality nylon,provent the items inside from being wet. This backpack has a roomy interior large panel loading main compartment which can be easily put some daily necessities,clothes and sporting goods,one computer layer for laptopthree front zipper pockets to hold small accessories and two side pockets for water bottle or umbrella. Lightweight straps design,much more comfortable.Increase air cushion gasket back and waist,breathable mesh and inner filling soft interlayer sponge,buffer shock absorption,reduce the pressure of body contact area,further enhance with comfort. Folds into zippered inner pocket to fit anywhere,unfolds from pocket to backpack,perfect for every trip.With unique alpenstock net which is good helper for outdoor mountaineering. This backpack is perfect for day-to-day use or occasional travel,mountaineering,hiking,camping,other outdoor activities and great gift for everyone.