It is the same rubber mat used on sea doo's - jet ski's and is glued down. Lasts about 3 years and then the sun gets to the white areas. They come in different colors and patterns and I have seen some that use black rubber mat. Much easier on swim suits and is not slippery. I am sure there are other places but this is where we got ours. Took me a little while to find it or I would of replied sooner.
http://www.hydroturf.com/