When we hear rest mats, we are not talking about those that we put on our bed. These are the mats that we let out kids use when they play. You can see many these in Day Care Centers. There, they let the kids rest and take naps on rest mats because it is soft enough that they can actually sleep on it but small and convenient to carry and store.
You should not buy just any rest mat available or the first one that you see. Like any other product that you buy, you need to consider a few things before actually buying it. First you need to look at the floor where you are going to place your mat and then count the children that need to use the mat(s). Knowing these things will help you to decide the size of the mat you are going to buy and the quantity too. You should, of course, know the age of the children who will use them.
There are mats that are quite thin and there are thicker ones also. If you want the kids to be comfortable and not get cold easily, then the thicker mats are right ones for you. It is also advisable that you buy mats that can be easily washed when they get dirty. You should be washing your mats regularly so as to avoid germs from staying there which could in turn go to your kids and make them sick.