Waterproof: Oxford fabric molecular density is thick and never afraid of rain 

Wired connection: plug a power bank and connect the external USB to the phone

Anti-theft Design: Security anti-theft password lock for more travel safety

Multilayer storage space: there are shoulder strap card slots, convenient side pocket, back pocket and main sacks 

Double buckle switch at will: Can be replaced left and right to reduce shoulder burden

Safer at night: reflective dedign printed on the surface, safer at night