RIDEZ TRANSPORTER hard shell seat bag RTS07 with waterproof cover. Can be removed from the bike and used as a backpack. Includes a rain cover. The hard shell seat bag is perfect for carrying small items. After getting off the bike, simply unfasten the four buckles and attach the included belt to carry it as a backpack or shoulder bag. The hard shell part is water-repellent, but please use the included rain cover when it rains. The mounting belt is simply passed under the seat and secured with four buckles and the belt. Shorten any excess belt with Velcro. Purchased three years ago and used for one year, then replaced due to insufficient capacity. Stored indoors, but will be put up for sale as I have no plans to use it in the future. There is a noticeable scratch in one place as shown in the 4th image, but I don't think it will cause any problems during use. Color: BLACK (black) carbon taste Dimensions (cm): 30 x 23 Weight: Approximately 600g Capacity: Approximately 5 liters