The format of the fill is also important: Shredded or chopped foam will allow for more airflow than a solid slab. Alternatively, a fiber mattress topper filled with cotton or polyester can add ...

Adding a topper to your mattress ... (that's not foam), consider Saatva's Down Alternative Featherbed Mattress Topper. It's filled with hypoallergenic down and lyocell fiber and is soft enough ...