CYY Waterproof Outdoor Sports Rucksacks Hiking Travel Bags Backpack 50L C010BG Material:600D PVC nylon,durable, can carry heavy-duty. Size 50L=Length:12.6''x Width:8.7''x Heigth:20.9'' Features:Durable,waterproof,padded and adjustable shoulder straps;Reinforced drag handle;Heavy duty rust resistant nylon zippers.Breathable mesh backing provides a cool feel in hot weather.Thickened computer protective interlayer inside,extra compartment for accessories. Advantages:The outdoor backpack can be carried by a single shoulder, or by two shoulders, or by hand.large capacity,Wide shoulder straps help take the stress off your shoulders ,save energy, It's concise designed for convenient and practical and multiple application. Occasion:Hiking,climbing mountain,camping,cycling,various outdoor sports.