This is a set of a collar and leash made with imported genuine leather from Norway. The leather is sourced from animals raised in cold regions, making it highly durable, supple, and soft to the touch. It's gentle on your dog's neck and skin, and resistant to chafing. High-quality alloy is used for the hardware, making it resistant to fading and abrasion. It can be used for a long time. Features a half-P chain design to prevent escape. When your dog pulls back, the collar automatically tightens moderately to prevent slipping off, but it won't constrict the neck too tightly. Can also be used as a waist leash. Includes a handle for easy control over short distances. Sizes: XXS: Suitable for dogs weighing 3.5-6kg Neck size: 26-32cm Please feel free to contact us for other sizes. Our own dog actually uses this set. It's a highly recommended set with excellent cost performance and quality. Currently, the red and orange leashes are out of stock and will require approximately 3 months for restocking. Thank you for your understanding. Products are scheduled to ship on April 5th.