Serta® Perfect Day Donelli 11.5" Medium Mattress

Serta® Perfect Day Donelli — Medium Meet the Donelli, a medium mattress built to help you stay cool, supported, and undisturbed all night. At an 11.5" profile, it pairs breathable foam with targeted lumbar support and a curve-hugging coil system, so balanced comfort never sacrifices support. Breathe easy all night. PillowSoft® Aire Foam lets fresh air pass through the mattress, helping prevent that hot, stuffy feeling so you sleep cool from lie-down to wake-up. Support where it counts. A Gel Band Lumbar layer provides targeted support for the lower back and hips, so medium comfort doesn't come at the cost of alignment. Wake up refreshed. The 825 Edition Custom Support™ System delivers strong, curve-hugging support that adapts to your body, easing pressure where it builds up most and helping you wake up without the stiffness. Backed by a 10-year warranty and over 30,000 five-star reviews, the Donelli is made in the U.S.A. with globally sourced components, CertiPUR-US® certified, and compatible with adjustable bases — so it fits the way you actually sleep.