Expanda Mattress Pad Cover, Shredded Comfort Pillow and Twin XL 3 Inch Thick 4 Pound Density Visco Elastic Memory Foam Mattress Bed Topper Made in the USA Expanda Mattress Pad Cover which fits down over the top and removes easily for laundering One Shredded Comfort Pillow Filled with the Perfect Mix of Memory Foam and Resiliant Foam Made in the USA using enviromentally friendly processes. Exceeds PURGreen certification standards. 4 Pound Density Memory foam reduces pressure points that cause you to toss and turn, so you sleep better. Topper features a four-pound density and featuring a famous gel-like feel.