Black, Size S: 1-3 nights/40L) [Expandable Function & 3-Stage Adjustable Pull Bar] The zipper type allows you to expand the gusset width by 5cm, increasing the capacity by 20%. You can rest assured even if you buy more souvenirs at your destination. The lightweight and sturdy aluminum alloy caliber can be adjusted in multiple stages with a single button press to suit your height and usage scenario. [Dry and Wet Separation Bag & Hanging Storage & Free Dust Cover] The bag that separates wet and dry items can store wet items, and there is a 5cm expandable pocket between the layers at the zipper, where you can temporarily store small items, mobile phones, documents, tickets, etc. Free dust cover: Dustproof specification, can be folded when not in use. [Removable, Braked Shock-Absorbing Casters] Silent, durable dual-wheel casters, while achieving smooth gliding, can also rotate freely 360 degrees. Because special soundproofing material is used, the rattling sound is reduced by about 30% compared to ordinary casters! It reduces vibration on uneven roads and also has a brake function. In addition, the wheels are removable, making cleaning and storage after use easy, and repairs are also easy if damaged. [High-Quality Body & Reliable YKK Zipper] ABS resin is lightweight, elastic, and resistant to cracking, and PC (polycarbonate) resin is excellent in impact resistance and insulation. This achieves a high-quality hard-type body with high durability, which is a mixture of both materials. In addition, the YKK zipper, which Japan is proud of to the world, is standard equipment for the main zipper. It eliminates the zipper problems (zipper derailment and opening) that are common in zipper-type suitcases, and allows for stable use over a long period of time. [World-Standard Safety] A TSA dial lock, which is essential for overseas travel, is installed, making your outings safer. *The key is for airline inspection only and is not included with this product.