The winspansy vacuum tote backpack is made of high-density water-resistant fabric, which is not only waterproof and abrasion-resistant, but also scratch-resistant. You don't have to worry about your backpack getting wet even when it rains. The winspansy backpack with vacuum sealed compartments. You can compress and release the air by pressing manually or using an air pump. This large-capacity men's travel backpack helps compress clothing and is perfect for 3-5 day trips. It has multiple separate compartments for clothes, daily essentials, documents and other personal items. The main pocket has vacuum pockets to not only save space but also organise your various items, and the back compartment can hold a 15.6 inch laptop with more space. The vacuum pocket of the vacuum backpack has a high-density vacuum special zip, which is not easy to open, but this is to ensure the airtightness of the vacuum pocket. Meanwhile, the vacuum travelling woman backpack has many user-friendly designs, such as adjustable chest strap, breathable shoulder straps and luggage straps. About the air pump instructions： 1. Each light represents 20% of electricity, when the light is not on, it means that the air pump power is less than 5%, it should be charged in time. 2. Press the blue button twice to switch on and once to switch off. 3. Choose only one suitable nozzle at a time 4. Inflate: Install a suitable nozzle in the inflatable port and connect it to the product, then turn on the pump to start inflating. 5. Exhaust: Install a suitable nozzle at the exhaust port and connect it to the product, then turn on the pump to start exhausting. Warm tips:Do not store the air pump in a fully discharged state for a long time, charge it at least once a month during storage.