Purple 

The Purple injection-molded GelFlex Grid is so effective, it’s been used in hospital beds for critical patients for more than 20 years. Now it’s your turn to experience its next-level comfort. Purple holds more than 30 patents for cushioning technology; the Grid is made from a proprietary GelFlex polymer, the Purple Grid uses a repeating geometric structure to create cushioned comfort while maintaining support. The Purple GelFlex Grid, instantly adapts as you move, reconfiguring itself to support any position your body takes. There’s no lag time or interruption of that blissful floating feel, so you can roll, shift, or sleep-shimmy to your heart’s desire. engineered to be both soft and supportive – because that’s what your body needs. Its unique design creates hundreds of columns that work together to support broad surfaces like your back, but give way under concentrated weight to gently cradle areas like shoulders and hips. Unlike memory foam, the GelFlex Grid doesn’t trap body heat. As a result, 
Purple mattresses can maintain a comfortable temperature all night long. With over 1400 individual air channels the GelFlex grid dissipates 
excess body heat, drawing it away from you so you never sleep hot!