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. Please note: This is the mattress only. Sofa is not included. Click here to view more sizes.