This slip on leash is designed as collar & leash all-in-one type for walking, jogging and training dogs. It is made with polyester, making the leash very lightweight and durable. Material: Polyester Sizes: Medium – 3/8 inch x 5 feet, Large – 1/2 inch x 5 feet Colors: Black, Grey, Pink, Turquoise Features: 1. Easy to use. 2. Enhances handling. 3. Reflective for night time. 4. The stopper adjusts the collar to fit any size neck and prevents slipping out.