Some of the coolest types of mattresses include hybrid, natural latex, and memory foam. Hybrid mattresses contain a combination of coils and foam to maximize air circulation while still being cushiony and pressure-relieving. Memory foam is notoriously hot, but memory foam beds with cooling infusions, phase-changing materials, or plant-based oils are designed to be cool and comfortable. Latex is a naturally mattress material with similar properties as memory foam, only it’s naturally cool and slightly more durable.