Feel the weight of the mask as it relaxes your face and keeps you at peace by helping to alleviate the pain of headaches and migraines. Enhance the experience with the hot/cold insert and really feel the stress, tension, and pain melt away. The adjustable strap lays flat to avoid any discomforts while laying down while the soft micro-plush fabric caresses your skin, providing much needed rest and relaxation. You will fall asleep faster and stay asleep longer as the mask blocks out the light. The increase in REM sleep will enhance your cognitive abilities while boosting your mood and energy so you can take on the day. For cooling, seal the insert in a plastic bag and cool for 1-3 hours. For heating, microwave the insert on medium heat for 20 seconds. Heat in 10 second intervals after, but do not exceed 50 seconds. Color: Gray.