Three-dimensional style composed temperament, light business leisure backpack; Ingenious design, anti-theft spring code lock; Selected fabrics wear - resistant and anti - splash water; Easy to shoulder, leisurely travel, back and shoulder strap design are ergonomic principles; External USB charging interface, easy to connect power supply; Triple security system; Easy storage, simple and effective organization storage layout is enough to meet the needs of daily commuting, security and anti-theft light and stylish.