The materials are fresh, and the new goods made in those years have a natural fragrance. Whether it is bamboo mat, straw mat or rattan mat, it should be fragrant without special smell. The purchased summer sleeping mat should be disinfected to prevent baby's skin allergy. You can scrub with a wet cloth first, and then put the mat in a ventilated and sunny place. Because the ultraviolet rays in the sun have certain bactericidal power, the mat can be exposed to the sun for 6 hours to achieve the purpose of disinfection. Turn it over often when you are exposed to the sun, so that all sides can be exposed directly. In addition, be careful not to let the baby sleep directly on the mat. You can spread sheets or towels on the mat to prevent the baby from catching cold.