GEL CONVOLUTION®Created for ultimate versatility and comfort, the Gel Convolution pillow includes a removable Gel Dough core encased in Gelled Microfiber fill offering different levels of customizable support for all sleeping positions. The convoluted memory foam core is infused with gel to create a cooler sleeping atmosphere. The outer layers of the pillow are made of gel coated microfibers offering a luxurious down feel without odors, allergens and sharp quills.