Mattresses | Restonic Restful Night Firm King Mattress with Dual Cooling | Foam | Black

Get the deep, restorative sleep you deserve with the Restonic Restful Night Firm King Mattress. Made for anyone who loves firm, supportive comfort (no sagging here!), this mattress uses dual cooling technology to wick away heat—ideal if you tend to overheat at night. The exclusive Marvelous Middle® feature adds 25% more support in the center, keeping your spine aligned for back or side sleepers. Plus, 800-series individually wrapped coils mean minimal motion transfer—so your partner’s movements won’t wake you up. Durable foams keep the mattress firm and stable for years, while breathable CoolFlow™ layers cradle your body just right. Whether you’re a warm sleeper or just want a reliable mattress that lasts, this is your go-to for cozy, undisturbed nights.