Zinus memory foam mattress off Amazon, especially if you like it firm.
Link to one
https://www.amazon.com/Zinus-Relieving-Mattress-Box-CertiPUR-US/dp/B012H0KBYK/ref=cm_cr_arp_d_product_top?ie=UTF8
Yep! https://www.amazon.com/Zinus-Relieving-Mattress-Box-CertiPUR-US/dp/B012H0KBYK/ref=cm_cr_arp_d_product_top?ie=UTF8
Sure! https://www.amazon.com/Zinus-Relieving-Mattress-Box-CertiPUR-US/dp/B012H0KBYK/ref=cm_cr_arp_d_product_top?ie=UTF8