Dimensions: 30*21*45 cm/ 11.8*8.3*17.7 in Functions: Waterproof, Ultra-lightweight, Wear-resistant, Capacity Expansion, Weight Reduction, Spine protection Large capacity loading space: Meet a variety of travel storage needs, fit all your favorites in. Reasonable pocket design: Multi-layer storage, reasonable arrangement of items, easy to access. The shoulder strap of the bag is adjustable to fit people of different heights. Made of lightweight and durable nylon: Lightweight and comfortable|Easy to clean|Strong and durable Comfortable and practical carrying experience: Practical design, refuse flashy embellishments; seemingly simple, but a lot of details——Honeycomb breathable shoulder strap, strong and durable Trolley strap design: Can be attached to your luggage for long distance travel to minimize the load. Comfortable carrying handle, less tiring for long time use. Smooth zipper design: The bag zipper is smooth to pull and smooth without snagging.