The Linea Vacuum Backpack features a built-in vacuum compression bag in its inner pocket, made from waterproof PVC and Polyester. It measures 30*15*47.5CM. The integrated vacuum system compresses belongings, saving up to 40% more space. Its capacity is expandable from 28 to 45 litres, suitable for cabin bag size, and requires no external pump for manual compression. This multifunctional backpack has four external zips, an elastic side panel zipper to increase size, and four adjustable side buckles for enhanced stability.