Material:Nylon.100% brand new and high quality. 3 sizes for choice:S-0.6×147cm;M-0.8×147cm;L-1.4×147cm. Adopt new reflective Nylon braided rope which can help you find your dog easily at night. Extremely sturdy and durable with adjustable loop, easy to operate,S-perfect fit for small-sized dogs;M-perfect fit for medium to large-sized dogs; L-perfect fit for large-sized dogs. Handy for exercise or breezing out at rest stops.Looking forwards to your feedback.