Ordered the full size mattress for bottom of bunk bed (also from Wayfair). Waiting on the mattress to arrive. But this 4 inch thick mattress exceeds my expectations!  I laid on it and it does provide very good support and pressure relief. The gel memory foam remains comfortably cool. The mattress cover is well made from quality material and quilted adding another layer of comfort. I will purchase this mattress topper again for our other beds.