I didn't like this mask and this is my first negative feedback here :( I decided to buy this self heating mask of pure curiosity - to check this heating effect which is the opposite to what I like (I like products with cooling effect in eye zone). So when I applied it to my eyes it started heating.. In one minute it was extremely HOT under this mask so I felt like my eyes were put in convective oven. Then my eyes started watering underneath. I thought I was going to end up in having bloodshot eyes but luckily everything was OK after I took the mask off. As you can imagine, I did not see any improvements, calming effects etc in this area. The only PRO is that while it's on it has a real relaxing and nice scent of some herbs mixed with menthol.
It was the "hottest" experience in my life lol))))