It's the fake grass stuff. Maybe once we get the box done it might be ok. We did soap and water it and it helps but I can't keep soaking it, as it will mess up the yard pretty good and we can't have that either.
So we'll see how she goes. He's having fun for now so that is what counts...
Highly recommend putting half a dozen things of PVC Piping over that thing so it actually slides. Way cheaper than HDPE. I'd love to make a long PVC/2x4 rail thingy for my back yard, but it doesnt snow down here, nor do I want to use astro turf.
That is what my friend and I built in his backyard. We found the same thing about the astroturf being slow. The sharp tips of the blades of "grass" make alot of friction. We had to add a few feet of height to get the ramp to work good. Final height is 6ft. We also use soilmoist Amazon.com: Soil Moist SMN10 10 oz Natural Absorbing Granules: Patio, Lawn & Garden We put it in an old blender to make it a powder and it makes a slimy gel once water is added. Close to snowgel. We want to get some powderpak to replace the astroturf.
Unless you can find HDPE for really cheap save the cash and get some PVC boards from Lowe's. The PVC top on our box is 8ft long and cost less then $35.