Tigernu Compression Backpacks 15.6 17inch Laptop Men Automatic Vacuum No Pump Travel Backpack Bags TSA

FEATURES Similarities: 1. Brand patented zipper, double layered zipper on the main compartment. Anti theft, smooth, wear-resistant, long service life, explosion-proof, 10-year zipper warranty. 2. High quality nylon fabric, wear-resistant, dirt resistant, frost resistant, water-resistant, odorless, environmentally friendly fabric. 3. Other functions: reflective strip, TSA customs lock, USB charging port, reinforced shoulder strap, curved shoulder strap, hidden zipper on the back, keychain, etc. Differences: 1 T-B3105-3A: 15.6-inch ordinary backpack, no vacuum function, no vacuum pump, no expansion, no 180 ° opening, no waterproof cover, no dry wet separation bag, etc; 2. T-B3105-4A: 17 inch regular backpack, no vacuum function, no vacuum pump, no 180 ° opening method, no dry wet separation bag, with expansion and waterproof cover. 3. T-B3105 Vacuum Backpack: 17 inch vacuum backpack, with vacuum compression function, expandable, 180 ° opening mode, dry wet separation bag, no vacuum pump, no waterproof cover.