• 【Expandable Design】4-in-1 backpack with expandable capacity from 24L to 32L, perfect for accommodating extra items during travel.
• 【Built-in Air Pump】Equipped with a removable 3.7V 800mAh lithium battery-powered air pump for convenient compression of clothes and saving up to 50% space.
• 【Large Laptop Compartment】Fits up to 17.3-inch laptops in a dedicated padded compartment, ensuring your device stays protected.
• 【Travel-Friendly Features】Includes a luggage strap for easy attachment to rolling suitcases and the anti-theft zippers for added security.
• 【Comfortable Carrying】Features a breathable honeycomb back padding system that promotes air circulation and reduces pressure on your back during extended wear.
• 【Water-Resistant Material】Made with water-repellent polyester fabric that keeps your belongings dry and is easy to clean.

Specifications:

• Model: PS-678
• Weight: 2.1 KG
• Capacity: 24L (Expandable to 32L)
• Dimensions: 34 x 14 x 50cm (Expandable to 34 x 19 x 50 cm)
• Laptop Compartment: 32 x 43 cm (Fits up to 17.3-inch laptops)
• Material: Polyester
• Small Storage Bag: 28 x 8 x 15cm
• Mesh Storage Bag: 28 x 8 x 15cm
• Transparent Storage Bag: 26 x 5 x 15cm
• Air Pump Battery: 3.7V 800mAh rechargeable lithium battery
• Features: Detachable vacuum-sealed bag, luggage strap, anti-theft zippers, external charging ports