Specification：
Capacity: 20-35L
Internal structure: zipper bag, mobile phone bag, ID bag, sandwich zipper bag, computer socket bag
Open way: zipper
Applicable gender: gender-neutral/both genders
Material: Oxford cloth
Lock or not: No
Rain cover or not: none
Function: waterproof, wear-resistant, anti-theft, anti-seismic, capacity expansion
Size: 32cm*11cm*45cm