Vacuum compression backpack

**Material:** Waterproof Oxford cloth  **Dimensions:** 49 cm x 32 cm x 15 cm (expanded: 49 cm x 32 cm x 20 cm)  **Capacity:** Fits a 17.3-inch laptop   **Features:**  - Separate laptop compartment  - Vacuum compression:    1. Open vacuum bag    2. Place clothes inside    3. Open the valve and press it to remove the air  - Breathable back  - Comfortable foam straps  - Anti-theft back pocket  - Waterproof and wear-resistant  - Wet/dry separation area  - Password protection  - Equivalent to a 24-inch suitcase capacity   **Quick Exhaust: One-Way Air Valve Cabin** The One-Way Air Valve Cabin utilizes pneumatic principles for easy air expulsion without an air pump.  **Instructions:**1. Open the vacuum bag.2. Pack your clothes and zip the airtight zippers.3. Open the exhaust valve.4. Press to expel air.