Mendota Visi Vest -The Visi-Vest’s blaze orange color and 3M Scotchlite reflective material ensures your dog is always visible, whether it’s during the day or at night…in the field or in the city. Comfortable High Visibility Light Weight Medium - Back Length 16-24in, Waist Circumference 24-36in, Weight 40-80lbs Large - Back Length 22-30in, Waist Circumference 24-36in, Weight +80lbs