Polyurethane coated nylon. Soil and odor resistant. Water repellent. Resists rotting. Durable and long lasting. Easily cleaned. Can be cut off and holes added without burning or melting like conventional nylon. Ideal for identifying your dog in the field during the day. Very popular with beagle, bird, and running-dog owners. To find correct length, add 4" to the dog's exact neck size. Available in 19", 21" or 23".