Ours is outside on our decking. We put it there because we have a bubble machine, it would go on and the bubbles would splash on the deck, making it slippery and the kids would fall over. The mat has been perfect for that because it's non slip. She doesn't chew on it.

We also have the black ones that you buy in camping shops that we have put on the base of our tent. We've upgraded to a camper, but we're going to use the mats for the bottom of the annex, but guess we're going to ditch them now too. And these ones weren't cheap.