Purest and all natural latex pillow available in the market. These pillows do not contain any synthetic latex or other synthetic additives (Most others, blend synthetics to reduce cost) . Made from milky sap from tropical rubber trees, these pillows are made from superior unique all natural sapling to provide superior support, comfort and durability. The pin core design provides superior air flow making pillows sweat free for all season comfort. The resilient latex offers a cradling effect for neck and back for superior support. Adding to these benefits is all organic cotton zippered washable covering for healthy living. No memory foam (made of synthetic chemicals), no gel (pthalate by product) etc. . just natural content. Organic cotton covering provides healthy environment, free from any chemicals or off-gassing. Made by Organic Textiles LLC in California, these pillows with organic linens offer superior comfort and purity.