ozuko New Style Outdoor Backpack Man USB Anti-Theft Large Capacity Multi-Function Waterproof Travel Backpack

Features:
Dual zipper design, high hardness, anti-rust and fading.
Expandable design, 20-35L large capacity main pocket, multilayer storage space.
Superior oxford cloth, waterproof, wear-resistant, breathable.
Top, bottom and side invisible pocket anti-theft design.
External USB port, reduce the charge limit of space, free hands.
Widen shoulder straps, adjustable length and release pressure.
Three-dimensional breathable pressure relief load, high elasticity.