This is not your typical egg-crate foam pad. Tri Zone foam is manufactured with extra-thick, high-density polyurethane, convoluted foam and formed with a unique combination of three distinctive zones to reduce stress on the pressure points and provide customized support for your entire body.Peaked foam promotes air circulation for a cooler, dry and comfortable sleeping surface, and improves circulation by distributing body weight evenly from head to toe.Relax in comfort when you shop online at Overstock.com.This item is compressed for shipping. Once opened, please allow the foam to breathe for 24-48 hours prior to use. This will allow the foam to fully expand and provide the optimum comfort.Imported