A total of 4 reviews of this product on Reddit.
HOSPITOLOGY PRODUCTS Mattress Encasement – Zippered Bed Bug Dust Mite Proof Hypoallergenic – Sleep Defense System – Full/Double – Waterproof – Stretchable – Standard 12″ Depth – 54″ W x 75″ L https://www.amazon.com/dp/B006C6EWXW/ref=cm_sw_r_cp_api_i_3BQZ6EMMEJG6N4Q78BAN?_encoding=UTF8&psc=1
I found using a mattress encasement helps keep it from getting gross. I use one, since if I run the slightest fever, I sweat buckets. This is what I use.
Sleep Defense System – Waterproof / Bed Bug Proof Mattress Encasement – 54-Inch by 75-Inch… https://www.amazon.com/dp/B006C6EWXW/ref=cm_sw_r_sms_api_5Ewuxb…
you havent been ruining it but it would probably be more comfortable/better in the long run if you put a mattress cover on! you can also get an encasement to protect it from stains, spills or bugs http://www.amazon.com/Sleep-Defense-System-Waterproof-Encasement/dp/B006C6EWXW
I’m pretty sure it was these: http://www.amazon.com/Sleep-Defense-System-Waterproof-Encasement/dp/B006C6EWXW