PREMIUM KNITTED FABRIC: The top cover of this calking size mattress in a box boasts a soft knitted fabric design, soft to touch and skin-friendly, providing you a plush feeling that absorbs moisture and balances body temperature for an ideal sleeping surface. The high-density MDI memory foam beneath the cover enhances airflow, ensuring a restful night's sleep. ADVANCED SUPPORT SYSTEM: Our california king mattress utilizes a zoned pocket spring support system, consisting of hundreds of individually wrapped stainless steel coils. This innovative design ensures even weight distribution and excellent motion isolation, preventing disturbances from your partner and providing a peaceful sleep environment. LUXURIOUS HYBRID DESIGN: Combining the benefits of MDI memory foam, soft comfort foam, and high-density foam with individual pocket springs, our california king mattresses aligns your spine and distributes body weight evenly. This design effectively relieves pressure points, allowing you to wake up without back pain and enjoy a truly luxurious sleep experience. CertiPUR-US CERTIFIED: Our DIGLANT all-foam mattress is CertiPUR-US certified for content, emissions, and durability, and has been tested and certified by independent, accredited laboratories. None of harmful substances and fiberglass, and complies with CFR1632 standards flammability testing and is OEKO-TEX certified, ensuring a healthier sleep environment. 10 YEARS SUPPORT: As the brand owner and manufacturer that DIGLANT will always bring you a quality mattress that is comfortable. Each mattress we sell goes with a 10-years support and 100 nights trials. You can decide if the mattress work well with you. Upgrade your sleeping experience with the DIGLANT Mattress today.