The Nature's Spa Oasis mattress's unique natural hybrid pillowtop design creates a breathable, healthier sleep environment with firm, restorative support. The coil-free core offers superior stability and is CertiPUR-US certified. Layers of copper infused natural Talalay latex, comfort gel and natural silk, wool and cashmere fibers work in unison to provide temperature regulation, targeted support and incredible comfort. This hypoallergenic, environmentally friendly mattress is wrapped in a stretch knit BCI cotton cover. 10 Year Non-prorated Warranty.