If you want to buy a Split-King mattress, buy two TwinXL mattresses and select the firmness for each. To learn more, read our article here. The Twinkle Pedic Hybrid™ is expertly designed, leveraging Twinkle Bounce™ technology, to deliver ultimate comfort and exceptional lumbar support, making it the ideal choice for every type of sleeper. This innovative mattress features Graphite Infused Contour Foam, which gently hugs your body while maintaining a cool sleeping surface. Unlike traditional memory foam, this advanced material boasts a quick bounce-back response, preventing you from sinking too deeply and allowing for easy movement throughout the night.Crafted to accommodate all body types and sleep positions, the Twinkle Pedic Hybrid™ offers a supportive experience tailored to your unique needs. At its core, the mattress features individually pocketed coils combined with Patented Zoned Nested Coils, providing targeted lumbar support and ensuring your spine remains in a neutral alignment. This thoughtful design minimizes motion transfer, so you can rest undisturbed even if your partner moves during the night.To enhance your comfort further, the Twinkle Pedic Hybrid™ is equipped with a CoolTouch Regulating Temperature Cover. This innovative cover incorporates conductive fibers that actively move heat away from your body, promoting a cooler and more restful sleep environment.Experience the perfect blend of support and comfort with the Twinkle Pedic Hybrid™. With its unique features, this mattress is engineered to hug you back while ensuring you wake up refreshed and ready for the day ahead.Mattress height: 13"