【Expandable with Flight in Mind & 3-Stage Adjustable Handle】 Designed with in-flight travel, business trips, and vacations in mind, this suitcase features an expandable structure with a zipper closure. By expanding the gusset width by approximately 5cm, the capacity increases by about 20%, providing peace of mind even if you acquire more luggage or souvenirs during your trip. The lightweight and durable aluminum alloy handle can be adjusted to three stages with a one-push operation to suit your height and usage scenario. 【Wet/Dry Separation Storage, Hanging Storage, and Dust Cover Included】 Equipped with a wet/dry separation bag to store wet and dry items separately. Inside, there are convenient pockets for temporarily storing small items, smartphones, documents, tickets, etc. A dust cover with dustproof specifications is included for storage when not in use. 【Removable Double Casters with Brakes】 Durable double-wheel casters provide smooth 360-degree rotation for comfortable travel. The design minimizes vibration and noise during travel, ensuring stable movement even on uneven surfaces. The brake function provides peace of mind on trains and slopes. The casters are removable for easy cleaning, storage, and replacement. 【Durable Hard Body & YKK Zippers】 The hard-type body combines ABS resin and PC (polycarbonate) resin, achieving both lightness and impact resistance. The main zipper uses reliable YKK zippers, ensuring stable use for a long time. 【TSA Dial Lock】 Equipped with a TSA dial lock for peace of mind when traveling abroad. Airport inspections are possible while the lock is engaged.