NYHAMN sleeper sofa, with foam mattress/Naggen beige - IKEA
Futon Mattresses - Sofa Bed Mattresses - IKEA
Amazon.com: Dyonery 4.5 Inch Memory Foam Sofa Bed Mattress Replacement with Fiberglass-Free and Washable Cover for Sleeper Sofa and Couch Beds, Queen Size, White (Sofa Not Included) : Home & Kitchen