The Black and Red reversible laptop sleeve is made of soft, stretchable neoprene material and can accommodate your laptop easily. It can be reversed to adapt a new look alike into a red sleeve just by reversing the sleeve from inner side. Memory foam is made from polyurethane with additional chemicals that add to its viscosity level, thereby increasing the density of the foam. It is often referred to as visco-elastic polyurethane foam. Memory foam was originally developed by NASA to ease the pressure of extreme G-force during space shuttle take off. Our Laptop Sleeves uses High Density Memory Foam which protects your laptop from knocks.