Niagara Sleep Solution Ultra Soft Queen Size Mattress Topper - Rayon Derived from Bamboo Pillow Top Mattress Pad for Back Pain Relief - Naturally Cooling for Hot Sleepers, Green

I recommend one of these (bamboo pillow top)--it adds a little surface softness and is great for temperature regulation. There are many possibilities on Amazon and probably good prices this week: https://www.amazon.com/dp/B07D5DN269?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1

For the charcoal bamboo one it's Lucid brand, this is the topper I got