I have a small 8lb Maltese, the Half Ramp II , makes it easy for her to get into my vehicle. I have an SUV,  I put the ramp on the ground to the door and she climbs right up. The Half Ramp II is made of sturdy plastic, on the running board part of it is like a sand paper material. I also use it inside so, she can climb up onto the couch and the bed so I dont have to life her up anymore. If you are in the market for a ramp for your dog, small, medium or large I recommend  the HALF RAMP II.