The Martha Stewart Adjustable Reflective Harness Vest for Dogs features highly visible reflective material that is activated by vehicle headlights and is visible up to 60 feet away, so nighttime walks are safe and easy. This one-of-a-kind harness vest can be used in daylight as well. The harness is made with lightweight materials and features a padded mesh interior lining for ultimate comfort. The dual strap design provides maximum adjustability with hook-and-loop fasteners and also helps to distribute weight against strong pullers. To take the guesswork out of sizing and to ensure proper fit, simply measure your dog’s neck and chest (at the widest part) and select the corresponding size, allowing for two fingers of ease in both places. If your dog is on the border of two sizes, we recommend selecting the larger size. Available in three contrasting color binding and buckle options and in three sizes—the largest of which includes adjustable buckles for additional security.