Our Day-Glo Collars are resistant to moisture and mildew and excellent for identifying dogs in the field. Popular with beagles, bird hunters, and running dog owners. Made of durable vinyl-coated nylon with nickel-plated hardware. Free nameplate available with each collar ordered. When you select these collars, you will be guided at checkout for engraving information. To select collar size: Measure the dog's neck and add four inches. Example: 17" neck will need a 21" collar.