We can send people to the moon, but we can't make a pet ramp that is lightweight.  I did a lot of research and decided on this model even though it weighs 18 lbs.  Heavy duty, does the job, but bulky and heavy, even though it folds. I like the rubber grips, as opposed to rough sandpaper or dirt-tracking carpet.  My 8-year-old 74 lb. Australian Shepherd  Blue Heeler with hip problems took to it immediately, but we have a two-story house so he's used to stairs. The purchase and delivery were 100 from Wayfair. Four thumbs up.