Ingredients: Outer Sheet: Nonwoven fabrics.
Heat Cell: contains iron powder, activated carbon, water, fragrance.
Once the pack is opened, the heat-generating pad comes into contact with oxygen in the air, oxidizing the iron powder and producing heat.
It is self heating and warms up to about 40˚ Celcius
The water contained inside the pads of the eye mask evaporates producing a gentle steam.
Warm hands show a relaxing state
In a study presented in 2017, the Personal Health Care Research Laboratory of Kao Corporation (President and CEO, Michitaka Sawada) reported that moderate warming of the periocular skin region before bedtime improved the quality of sleep, e.g., ease with quickly falling asleep, in individuals with mild sleep difficulties *1 ,*2 . In the present study, Kao researchers focussed on body temperature, which is known to be closely related to sleep, and attempted to clarify the mechanism related to ease with falling asleep. Our results indicated that heat loss from the body is enhanced as skin temperature of the hands and feet becomes elevated by moderate warming of the periocular skin region (Fig. 1). That physiological change is similar to body changes related to falling asleep and considered likely to have a favorable effect on sleep initiation.