I went through some stuff a few years ago, and at that time, I couldn't cope with face masks. They used to make me feel claustrophobic but I actually love them now. Such an easy way to pamper yourself. Now, masks like this send me to the tropics even when I can't get myself on a plane!
Sephora's sheet masks, like their eye masks, are tissue format heavily soaked with the serum. Each variant is meant to have different effects, but realistically they just smell lovely but do much of the same thing relax you, and help your skin heal.
This is the Lotus scent - exotically floral but subtle with it.
My skin is always left lovely after these - I don't break out, it's plumper, hydrated, and smooth.