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.