I bought one of these just to kind of see what the hype about hydrogel masks were about.  I regret that I only bought one.  These hydrogel masks were so comfortable to wear.  They don't leave my face feeling weird and tingly after wearing them for a while like regular cotton sheet masks.  Guess that's due to circulation or something?  My face absorbed all the essence quickly.  I hate that sticky feeling you get when you have to wait forever for it to absorb.  I also noticed my face was very moisturized and calm in the morning.  Usually when I wake up my face is all splotchy, but this seem to soothe it.  I will definitely purchase again.