The first is safe.
There are not many chemicals that can guarantee your child's health. Second, to have a certain thickness and cotton.
Your child must feel comfortable when crawling on a climbing pad, not too hard or too thin. Third, the edges should not be too hard.
Your child may rip and crawl the edges of the climbing pad if it is too hard to scratch the child's mouth.
It is best to be able to develop your child's intelligence, and your child will look at the pattern on the crawl pad, which can increase your child's interest. When we buy climbing mats, we must look at the quality of the climbing pad, do not think that cheap on the good, must look at the climbing pad wholesale manufacturers of qualifications and climbing pad quality.