Vacuum Compression BackpackOur Vacpack Backpack is equipped with a one-way valve, you can choose the electric vacuum pump for rapid compression or manually press to release air, reducing wasted space between luggage expansion vacuum bags. Maximizes luggage space utilization Expandable Capacity Vacpack BackpackExpandable with vacuum compression to a capacity of up to 60 liters, equivalent to a 24-inch rolling suitcase. Save 50%-70% space in your luggage and easily carry more necessities.Yet, its dimensions are only 12 * 7.8 * 20in Dry/Wet Separation, Waterproof And DustproofFeatures multiple compartments and a dry/wet separation pocket to prevent damp towels, clothes from soiling other garments and electronic devices. Air Vacuum Backpack For Travel is made of waterproof material, it protects the contents inside from dryness, prevents dust, and keeps clothes fresh Anti-theft DesignThe main compartment features an anti-theft password lock, and there's a hidden zipper pocket on the back to safeguard your valuables from theft. You can explore new destinations with peace of mind, Stand out from the crowd with a backpack that combines functionality and fashion Versatile ApplicationThe Compress Backpack is crafted from durable polyester fabric, providing extra protection for your belongings on rainy days and ensuring long-lasting use for daily and weekend trips. Ideal for university backpack, weekend travel backpack, airplane carry-on backpack, professional business backpack, making it the perfect gift for travelers