We've researched numerous products in the market and this Canine Safety Belt, is by far the easiest to use and offers the best overall features, strength, and durability. A Pet Safety Restraint for your Canine will help: Prevent Driver Distraction Protect Passengers from Injury Reduce Injury to Pet Note: It may also be a law in your state. Strength and Durability The tensile strength of the High-Tenacity Nylon webbing used in this product is rated at 2500 lbs. The Steel (Nickel) hardware used has a similar rating. Available in XS, Small, Medium, Large and XL which can be adjustable for a perfect fit. Fits most breeds that between 25 and 185 lbs. Simple-to-Use Easily slips onto your existing vehicle seat belt. The process of buckling your pet into your vehicle could not be made more simple. Convenient Can also be used as a front end walking harness without making any modifications. Just attach your dog leash and go. Disclaimer It is very difficult to know exactly what happens to a dog in a vehicle crash since the testing tools available in the industry are very limited. In our opinion, a dog that is harnessed reduces that chance of the pet being injured by hitting other objects or occupants in the vehicle. It should also protect a dog from injuries associated with sudden stops and starts. WSPP-WPCBeltSize: SelectXSSmallMedium (+8.00)Large (+10.00)XL (+12.00) Thank You for Shopping At Two Tuttle's Four Paws.