This is likely due to the comfort layers up top, which are made with high-density memory foam ... every mattress we recommend on this list is made without fiberglass. We checked fiber content ...

When used in a mattress, the material is usually found in the top layers, either blended directly into the comfort foam or sewn into ... through the night. Our core body temperature drops at ...

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 ...