OEM mattress was horrible. We ordered the Visco Memory Foam RV Mattress topper, mattress pad, and sheets, all in RV Queen size from AB Lifestyles (AB Lifestyles USA Made Bedding for Home and RV). What a difference! Fantastic company to deal with. They answer the phones right away, very helpful, very quick shipping.
We bought a new Mattress from Michigan Discount Mattress.com
Its a Plush Pillow Top coil spring mattress, it is amazing, i've never slept better in an RV.
The ICool is going in the dumpster.
Here is the contact info.
Manager, Michigan Discount Mattress