Made of high quality nylon, these durable collars house a flexible, light-transmitting polymer core that illuminates when the collar is turned on. Powered by a super-efficient LED, a bright way to keep your dog safely visible to you, other people, campers, hunters, cars, and any other night-time hazards. Works best during any late-day or early morning outing.

Available in seven colors and four sizes (S, M, L, XL), this LED dog collar has three mode settings: slow flash, fast flash, and constant glow. Collars are weather-resistant, visible for up to 1000 feet, have a replaceable battery that is included and easy to replace after ~75 hours! 

S: Length: 35-40 cm ( 13.78 in - 15.75 in); Width: 2.5 cm

M: Length: 40-48 cm (15.75 in - 18.9 in); Width: 2.5 cm 

L: Length: 45-60 cm (17.72 in - 23.6 in); Width: 2.5 cm 

XL: Length: 45-68 cm (17.72 in - 26.77 in); Width: 2.5 cm