All-natural Euopean latex mattresses wool-filled high performance German stretch cotton covers. They come with adjustable-support slat suspension. “The slats’ give and rotation constantly respond to the shifting planes of your body. And the slat settings can be modified to accommodate changing body needs or comfort preferences over time…Both our mattress covers and all-natural Talalay latex foam have been tested for harmful substances according to the European Oko-Tex Standard 100, and have been certified to meet the human-ecological requirements of their current standard for mattresses…and contain no polybrominated diphenyl either (PBDEs)