We bought a CGear Sand-free Multimat (Amazon link:
CGear Sand-Free Multimat) about a year ago and really loved it. I got the small 6 x 6 foot orange mat, the top side is a bright orange color and the bottom side is a lighter orange with gray color binding. It came with a carrying bag, which is made by same material. The mat has a dual layer weave which is tough and resilient. The material used could be a little rough for someone with sensitive skin like a small child, but for most people, it's not going to be a problem. If you prefer a softer top layer, you can opt for the CGear Sand-free Rug (Amazon link:
CGear Sand-free Rug).
We used it on the beach, campgrounds, and picnics. But most of the time I just lay it outside the RV as a doormat to minimize transfer of dirt and sand from outside to inside the rig. Small dirt particles, dust and sand just falls through the mats top layer to the ground beneath, but not back up therefore creating a sand free outside area. If a big lump of sand falls onto the mat, simply wipe your hand over it once and the sand will go straight through. The only gripe is it does not work well when sand and dirt is wet, it sticks to the mat...well they stick everywhere anyway.
Online seller promotional image