• Expandable capacity: Large capacity, with an expandable design, it can store your clothes, laptop, tablet, cell phone, headphones, etc
• Durable material: Made of quality fabric, it is waterproof, wear-resistant and scratch-resistant
• Portable: With a trolley case fixing strap, convenient to keep it stable on your trolley case, easy to carry to travel
• 180° opening and closing design: Humanized box-type structure design, 180° opening and closing, convenient for storing and taking items
• 15.6-inch laptop compartment: Independent laptop compartment, thickened and shockproof, protects your laptop
• USB port: With a USB port to charge your phone conveniently via connecting to a power bank
• Breathable back pad: Honeycomb structure breathable back pad, promotes free air circulation, effectively reduces back sweating

Specifications:

• Model: CB-8290
• Material: Polyester
• Capacity: 21L/31L
• Weight: 1KG
• Interlayer size: 29*39cm
• Laptop capacity: can hold 15.6-inch laptop
• Size: 32*15*44cm
• Size after expansion: 32*22*44cm

Note: Due to manual measurement, there is a normal error of about 1-3cm, please refer to the actual product!