1. Double-layer zipper, explosion-proof zipper, anti-theft & longer life time;
2. 900D high-quality Oxford material, wear-resistant & scratch-resistant;
3. Anti-Freeze and Waterproof, with environmentally friendly fabric, no peculiar smell;
4. Unimaginable 29L large capacity design & Muti-functional pockets: main compartment, independent 17.3 inch laptop compartment and detachable suspension small bag ;
5. Utility model patent: Shoulder guard swing device, can adapt to the shoulder width of different people and automatically swing to adjust the neck comfort
6. Other convenient details design, such as reinforced shoulder strap, retractable hook, expanded handle and so on.