The Wife PIllow memory foam insert is made exclusively for Wife Pillow to bring additional contouring support and comfort to your sleep experience. The Wife Pillow is the most adjustable pillow ever made, and the memory foam insert allows you to further customize the support and feel of your pillow. Just unzip the top of the Wife Pillow and place the insert inside. It’s easy to insert and remove in seconds. The memory foam insert is made with the high quality CertiPUR-US certified memory foam. The high-density, slow rebound 80D foam delivers cloud-like softness and supportive density for a blissful and tension-free night’s sleep. The memory foam insert is thin yet powerful, making your entire Wife Pillow feel like a huggable memory foam pillow.