Z Memory Foam Pillow with Tencel Removable Cover - Low Loft, Plush - Queen Z formula produces superior, soft, doughy memory foam Open cell technology yields maximum resiliency and durability Allows your head to sink into the pillow a little more for a softer sleep experience; 4.5 inch low loft ideal for stomach sleepers or for people who prefer a thinner pillow Breathable construction allows heat transference and maintains comfortable sleeping temperature Tencel removable cover with superior moisture-management properties aids in optimal sleeping temperatures