Mainstays Back & Side Sleeper Pillow vs Sertapedic Won't Go Flat Pillow

Buy the Sertapedic if you want a firm pillow with a shape-holding core and a real warranty; buy the Mainstays if you want several extra-firm polyester pillows to rotate or stack. The Sertapedic has a supportive foam core wrapped in SupraLoft fiber and a 3-year manufacturer warranty, and its 4.2 rating from over 11,000 shoppers shows it holds up for most owners. The Mainstays is a plain extra-firm microfiber pillow with no core and no stated warranty, so it is the simpler, more disposable choice.

• Choose the Mainstays if you want a multi-pack of extra-firm polyester pillows for stacking, guest beds or frequent replacement.
• Choose the Sertapedic if you want one firm pillow with a supportive core, a 400 thread count cotton cover and a 3-year warranty.