Developed for NASA to relieve extreme G-force pressures, Isotonic® pressure-relieving material is a breakthrough in human sleep technology that will now change the way your dog sleeps. Isotonic Memory Foam is an opencelled, breathable material that is temperature-sensitive,Visco-Elastic, and able to distribute pressure or body weight over the entire surface area. Combined with firmer furniture grade foam for additional support. Sleek, clean lines make this a practical, stylish addition to any room in your home.