1. Cotton ramie surface, water repellent, wear-resistant and scratch-resistant
2. Lightening burden design, fits the back, comfortable and breathable
3. Multi-layer storage pocket, convenient to classify and carry personal belongings
4. Whit external USB port, can charge the phone at any time (power supply not included)
5. Can hold 15.6-inch laptop
6. Size: 30x11x43cm
7. Weight: about 680g