a21 M size: ¥1980 L size: ¥2450 XL size: ¥2680 [Color] Blue [Size] Back Size / Neck Circumference / Reference Weight L size: 38 * 23 cm / 36 * 48 cm / 3.5 - 6.5 kg [2-Way Bag for Carrying and Back Carrying] This is a 2-way backpack-type carrier bag that can be used for both carrying and back carrying. It's light and easy to carry in front, and can also be used as a back carrier or backpack. It has a sense of stability and is not easily deformed. It has sizes suitable for small and medium-sized dogs and cats, so please choose according to your needs. [Prevention of Jumping Out] The design of the buckle and zipper makes it easy to attach. There are double protections with buckles and zippers on both sides to prevent pets from falling out. You can feel secure with your dog at your chest, and you can see how your dog is doing because you can hold them. [Adjustable Length] The length of the shoulder straps can also be adjusted, making it convenient for various situations such as dog care, outings, and bicycle travel. It's an easy-to-use and stylish carrier bag for carrying your dog on outings.