100% cotton outer fabric (soft and reduces risk of allergy). With a soft blue light that lasts 15 minutes and is activated with the on/off button. During the last 15 seconds, the light dimmers until it goes off, thus encouraging sleep. There's also an optional turn off function. The mechanism is removable to facilitate washing.
If you want to turn it off before the 15 minutes is up, press the button at the back.
Batteries not included