【Breathable and Skin-Friendly】Duchess Tight Top hybrid spring mattress (firmness 8.0 out of 10) is made of Turkish organic soft knitted fabric on the top cover, which is breathable and skin-friendly. The breathable mesh on the side of the mattress helps dissipate heat and helps regulate body temperature effectively, ensuring a cool and comfortable sleep all night long. OEKO-TEX standard 100 certified. Tested free of harmful substances. Hypoallergenic material & 99% dust mite resistant. 【Memory Foam and Innerspring Blend】 Our Duchess mattress combines memory foam and individual pocketed springs. The gel-infused memory foam regulates temperature while conforming to the body to relieve pressure points, and the support layer of high-density foam is CertiPUR US Certified to help dissipate body heat. 5 zoned independent pocketed springs balance body pressure and keep your spine healthy. It allows you to sleep with comfort and peace of mind. 【Motion Isolation and Edge Support】 Firm mattress is designed for all sleepers. With hundreds of independent pocketed springs built in, you can enjoy undisturbed sleep even if your partner tosses and turns at night. This mattress provides the perfect head-to-toe support for sleepers, with enhanced edge-to-edge support to prevent sagging and rolling. Our mattresses are suitable for most platform bed frames, traditional frames, spring springs, and even floors. Our mattresses have a maximum weight capacity of 250 kg. Customized spinal alignment. Minimal motion transfer from a sleep partner Perfect for those wanting a firm to medium firm feel mattress High density foam mattress provides a comfortable and supportive base to sleep on Tightly knit edges and reinforced surrounding tempered steel coils maximize edge support The foam is CertiPUR - US Certified for durability,performance, and content When you receive the mattress, open it within 72 hours and allow 48 hours for it to return to its original, plush shape