Nite Dawg L.E.D. Collar Large Red Webbing -- Flexible RED L.E.D. Strong Nylon Dog Collar -- Bright RED L.E.D. - Flash or glow modes Flexible, light-up polymer core surrounded by strong nylon webbing Weather resistant - enclosed switch 3 adjustable sizes - fits small to large dogs Visible up to 1000 feet in the dark Long life replaceable battery- included 100,000 hour L.E.D. life Available in Red and Orange webbing Sizes: Small 10” – 13”, Medium 13” – 18”, Large 18” – 27”