The Nolah Evolution comes standard with a quilted foam top layer and an organic cotton cover. For an additional cost, you can upgrade to the GlacioTex™ Pillow Top, which features an extra 1" of quilted foam and a cool-to-the-touch GlacioTex™ cover.
While both options provide contouring comfort and breathable protection for your mattress, the GlacioTex™ Pillow Top offers even more cushioning and active cooling from heat-dissipating fibers.