Carpet pile is sound-reducing, giving a comfortable feel, and is soft and smooth on feet of any size. The rubber backing keeps the rug/rug in place when the child is playing or running on it. When children play, there are special needs that must be met in the play area, and this also applies to carpets. That's why rugs are made of durable synthetic fibers that are stain-resistant and easy to clean. We know that children's skin is very sensitive, but there is no need to worry. This product has been tested and approved and is completely free of substances that may harm your skin or your health.