We love the practical design of the Naturepedic EOS™ Organic Mattress with it's multi-layered zippered construction it allows you to customize the layers in your mattress. You can swap out layers, and even change the feel of your mattress years later. The entire EOS mattress is certified organic to the Global Organic Textile Standard (GOTS). We offer free shipping on the Naturepedic EOS™ Organic Mattress. Available in Twin - Cal King.