What materials are commonly used to improve mattress breathability?

Materials that improve mattress breathability include coils, natural or ventilated latex, open-cell polyfoam, gel or graphite-infused foams with airflow channels, and covers made from cotton, linen, bamboo, or other breathable fibers. These materials help air circulate and moisture evaporate more easily than very dense, closed-off foams and non-breathable fabrics.