Only been using since June by one person , always under mattress cover - smoke free and pet free home. I have back problems and wanted to give this a shot , incredibly comfortable but my stupid back was doing better on just my rock mattress so no where to put this now. Top rated on Amazon! LINENSPA 2 Inch Gel Infused Memory Foam Mattress Topper - Queen https://www.amazon.ca/dp/B01MYN9K5B/ref=cm_sw_r_cp_apa_i_EP4SDbB1KJG4W West pick up. Cross posted