The Sunset Ruby plush twin mattress from RC Willey offers high-quality support at a great low price. The 391 alternating LFK coils are designed to hinge, thus conforming to body shape. They're sturdy and stable and provide great support. They are covered by a cradle loft, a thick plush cradling fiber that adds softness and pressure relief. Have peace of mind with the fire shield, a proprietary blend of natural and synthetic fibers that help isolate the impact of a fire and limit its spread. Proudly made in the USA.