Product review (3 stars): arm saver
Bought these for my 80+ yr old mother. She is a baker and at her age a burn doesn't heal quickly. The guards are made from a rather thick material that was a bit difficult to snap onto the front of the racks. Did the job for sure, but they add height to the front of the rack, if you want to slide your cookie sheet with a sloppy pie into the oven odds are you are going to spill.  If you are like my mom, you want a tidy looking oven and once soiled, they don't clean up well. Plus taking them on and off would be a pain, as I said, the snaps weren't easy.
I'd look for the silicone version next time.