Traveling for the holidays? You need the Load up harness to keep your 4-legged babies safe in the car. Crash tested. Easy to use. Buckles into existing car seatbelts. See measurement picture and measure carefully. For this size it says it fits 32-42 inches, but my dog is 80 lbs and was right at the 32” and it was too large for him. So we couldn’t use it and by the time we came back from vacation it was too late to return. This is a really great company and highly rated dog seatbelt. Check out the website for videos on how it works. Ruffwear.com.