outdoor sports mountaineering backpack men's women's travel bag the logo can be customized

1. the new generation of 3d sharp tool, breathable and decompression backpack, has passed the professional test and patented back system. the combination of comfortable elastic foam and impact resistant outer layer makes it comfortable and durable 2. u-shaped three-dimensional ventilation back, with multi-layer honeycomb mesh elastic foam back cushion on both sides, reducing large area contact between back and backpack, promoting air circulation and heat dissipation 3. thickened waterproof / scratch resistant nylon cloth 4. large capacity storage of travel goods