Expendable Design: travel duffle bag can be expended from 11.81 inch to 16.92 inch, large enough to pack your stuffs when you go on a weekend tripLarge & Lightweight: 16.53 x 11.81 x 8.66 inches (W x H x D); weighs just 1.2lbs, the large overnight bag can hold 30L max; you can put clothes, electronics, toiletries, even kids stuff in the bagIntegrated Trolley Sleeve: It can be slid over the suitcase or luggage handle, stand on the suitcase stably, free up your hands and shoulder. The duffle bag fits easily in the overhead compartment for an airplane travelDry Wet Separated: There is a waterproof pocket in the weekender bag, You can put your wet towel, toiletries in the bag, it can help to separate the wet and dry ItemsMaterials: It is crafted from high quality nylon, durable and water-resistant; also can work as diaper bag, gym totes, carry all