My SO used to sleep on her belly. Then we got an overpriced mattress with the same material that NASA uses... I'm an endless chaser of value. I hate to overpa

My SO used to sleep on her belly. Then we got an overpriced mattress with the same material that NASA uses... I'm an endless chaser of value. I hate to overpay for things. That mattress was $5k (king sized). She sleeps on her back, and her sleep quality has measurably improved.