Vivaglory Durable Nylon LED Flashing Light Dog Halter Harness Night Safety Visible, 8 colors & 5 Sizes MULTIPLE COLORS & SIZES: Available in 8 colors and 5 sizes, ranging from XS to XL; Please carefully read the size chart in the last picture and select the most appropriate size for your beloved dog. This harness is fit for small and medium sized dogs. If your doggie is a big guy or lady, please take a second thought FUNCTIONS:LED light for walking at night; make your dog visible & keep your dog safe in advance with the super bright harness VARIOUS LIGHT SETTINGS: four flashing modes - Solid Light, Fast flash, Slow flast and Off; set whatever kind of flashing mode you and your dog prefer to make your dog cooler and safer at night FEATURES:USB rechargeable batterry gives 3 hours of illumination after recharging for 1 hour, one USB cable included & eco-friendly 100% CUSTOMER SATISFACTION: Any question or there is any problem with our product, please feel free to contact us via Amazon Message and let us know. Your satisfaction is our top priority.