Designed with an open cell structure for better ventilation, the Accu-Gold 13-inch memory foam mattress reduces the maximum force imposed on pressure points such the hips, allowing you to experience utmost comfort. The full size memory foam mattress features tightly packed Accu-Flex polyurethane foam that cradles your body while you rest.Rest in total comfort with a memory foam sleep systemSleep system includes three synergistically enhanced layers for ultimate comfortAccu-Gold visco elastic memory foam is comfortable and durableIncludes one 8-inch Accu-Flex medium firm support base layer for spinal alignment and total body supportTwo visco-elastic layers: one 3-inch Accu-Gold 5.3 layer and one 2-inch Accu-Aire 3.3 memory foam layerMeasures 52 inches x 73 inches x 13inchesDue to recent manufacturing changes this product is approved for home use and ships in one carton, fully assembled. Once opened this product is non-returnable.Memory Foam Do’s and Don’ts: To maximize memory foam expansion; remove from packaging within 72 hours of receipt.This product arrives very tightly packed. Please unwrap and allow 48 hours for this product to return to its original shape.Being sealed in plastic packaging sometimes traps odors. A few hours of airing usually removes the odor.Due to machine cutting manufacturing processes, there may be slight variances in the dimensions of this product. Due to the nature of Memory Foam the firmness level of every item is unique. Please be advised that even similar products may produce different firmness results