At the core of healthy baby sleep is the mattress. A firm, breathable, and low-tox mattress ensures safety and comfort throughout the night. Conventional mattresses often contain polyurethane foam, plastics, or harsh chemicals that may release toxins into the air. By contrast, organic mattresses—like those from Milari Organics Australia—use natural, breathable materials such as organic cotton and coconut coir to keep your baby cool, comfortable, and safe.