I bought two of these and used them for different purposes. One is used underneath my 8 year old daughter’s pool on the grass. I love it because it helps keep her and her little friends from tracking so much grass debris into the pool. It makes a nice safe cushion layer to protect the pool bottom from getting punctured too. It stays put on its own because it’s heavy weight enough that I don’t have to stake it down every time she wants me to set up the pool. It folds up really well and I store it in the garage until it’s dry and then put it in the handy-dandy storage bag it came with. It drains the water through very quickly when I drain the pool.I use the second mat in a dirt backyard. We have not been able to put in grass yet so this provides a large enough play area between my swing and in-ground trampoline that I can set the baby’s Little Tykes toys out and let her slide and climb on her little castle toy and run around without getting filthy. I got some 6-penny nails and fender washers to stake the mat through the loops on the corners. It has not even so much as flapped in the breeze or moved 1 inch in the last month since I put it out despite the fact that we have had several thunderstorms and even a microburst wind come through that nearly blew over my patio umbrella. I live in the mountains and we get a strong Canyon wind nearly every night starting at about 10 p.m. and lasting until about 7 a.m. The mat has never moved. It is lightweight but very strong and durable and has held up very well to my 2 year old driving her Little Tikes car around on it and my 8 year old sliding the Little Tykes toys around and re-arranging them many different times. It sweeps of easily in the mornings when I take the kids out to play.When I finally do get grass in the backyard, this mat will go on my actual patio to provide a more cushioned area to walk on. It is very nice feeling under bare feet.I only paid $69 each for these mats when I got them so they were a great bargain. I couldn’t find one cheaper anywhere. I am glad I purchased these and would do so again.