https://www.livescience.com/33097-does-your-mattress-really-gain-weight-over-time-.html https://www.livescience.com/33097-does-your-mattress-really-... "Accord

https://www.livescience.com/33097-does-your-mattress-really-gain-weight-over-time-.html https://www.livescience.com/33097-does-your-mattress-really-... "According to materials published by Ohio State University, a typical used mattress may have 100,000 to 10 million mites inside. Ten percent of the weight of a two-year-old pillow can be composed of dead mites and their droppings. Mites prefer warm, moist surroundings such as the inside of a mattress when someone is on it. One of their favorite foods is dead skin, and people shed about one fifth of an ounce of the stuff every week, some of which surely ends up flaking into your mattress."