Perfect mattress does exist. The combination of Bonnell Spring and 7 layer of support that provides great comfort and to indulge into a restful and amazing sleep. Our Bedra Bonnell Spring mattress is designed with medium-firm support which is a popular option among Australian sleeper as it provides just right comfort. Plus, it pairs with CertiPUR certification and Oeko-Tex standard Silver-ions knitted fabric that protects you from allergy and dust mites. That's all it matters. A perfect mattress and an amazing sleep. Note: Please allow up to 48 hours for the rolled mattress to expand to 100% of its full size.