This mattress is one of the best choice for a blissful sleep made with upgraded carbon and manganese alloy bonnell spring mattress with tight top construction for a firm support which provides a cozy and comfortable feel. The lower spiral system serves to absorb more extreme stress levels to the bed by contributing to the spring depth and bottom spring action to give your body support and in-depth relief. Premium quality jacquard fabric with chain stitched quilting is used at top with antiskid quilted fabric at back.