EFFICIENT VACPACK BACKPACK: Vacpack Backpack with check valve, you can use our electric vacuum pump for quick compression or manual pressure to release air, reducing the wasted space between vacuum travel bags for luggage or vacuum bags. Maximize the use of luggage space EXPANDABLE CAPACITY: This 60l Expandable Backpack with Vacuum Compression can be expanded by vacuum compression and can hold up to 60 liters, equivalent to a 24-inch rolling suitcase. However, its size is only 12 * 7.8 * 20…
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