Recommended by thousands of dog trainers around the world, the Martingale-Style Limited Cinch Collar is often viewed as the safest and most efficient way to train your dog. FEATURES: 1 Martingale Collar, Adjusts as pressure is applied to the leash providing training cue to dog, Made with high-quality nylon and reflective stitching. Durable iron chain enhancing the training correction, Design a limited chain closure, ensures the collar won't fully close or injure pets with chocking, Reflective stitching, just in case you find yourself walking, running, jogging, or hiking with your dog as the sun goes down. MEDIUM: 3/4" x 16-22'', Product weight: 0.21 lbs. LARGE: 1" x 20-25'', Product weight: 0.33 lbs. DETAILS: Nylon, Spot clean, Manufacturer's 1-year limited. For warranty information please click here - https://cs.kohls.com/app/answers/detail/a_id/140. , Model Nos. PET66-0017, PET66-0018, Imported. Color: Black. Gender: unisex. Age Group: adult. Material: NONE.