According to scientists, to fall and stay asleep, the body’s core temperature needs to drop by 1°C, or 2° to 3°F. This process induces sleep more quickly, and increases deep sleep by 10–20% (that’s the non-REM, slow-wave sleep in which brain waves slow dramatically and your body heals physically, recovers from illness, and deals with stress). Our CoolLife fabric continuously cools your body by 1°C/1.9°F, thermoregulating your temperature throughout the night to deliver deep sleep, which is the very basis of wellness in waking life.