Certified Safety & Peace of Mind: Rest easy knowing the Crystli hybrid mattress is CertiPUR-US and Oeko-Tex certified for durability and safety. Every layer is tested to be free from fiberglass, ensuring a healthier sleep environment with no unpleasant odors for you and your family. Balanced Medium Firmness: Designed for universal comfort, our medium firm mattress provides the perfect balance between comfort and reliable support. It cradles your body while maintaining proper spinal alignment, making it ideal for back, side, and stomach sleepers alike. Pressure Relief & Pain Reduction: Wake up refreshed with multi-layer comfort foams and individually pocketed coils that evenly distribute body weight. This thoughtful design in this bed mattress in a box relieves pressure points, helps ease back,hip, and joint pain, and adapts to different sleeping positions for deeper, restorative rest. Enhanced Edge Support & Durability: Say goodbye to sagging edges with reinforced perimeter coils that maximize usable sleep surface. This durable design in this hybrid mattress in a box not only extends mattress life but also provides better stability when sitting, lying near the edge, or sharing the bed with a partner. Motion Isolation for Couples: Individually wrapped coils work independently to absorb movement and minimize partner disturbance. Whether you toss and turn or get up at night, the advanced motion isolation in hybrid medium firm mattress ensures an undisturbed sleep for you and your loved one. Ideal for light sleepers, and family with pets. Important Reminder: As our mattress is vacuum-compressed and roll-packed, once it has been opened and fully expanded, it unfortunately cannot be rolled back into its original box for return shipping. We reconmmend to open it when you’re sure it’s the right size and ready for use. A mattress typically has a“adjustment” period, usually around 30–90 days, and the level of comfort can vary depending on an individual’s body weight and sleeping position.If you have any questions or concerns about your order, and the mattress, please feel free to contact us anytime. We’re always happy to assist. Sleep well and enjoy your new mattress!