The Algenist PERFECT Clarifying Pore Corrector Mask ($55; sephora.com) is a purifying, pore perfecting mask that I like to use once a week to get a deep cleanse and like a detox mask for my skin. Its quite a strong mask that gets all the gunk out of your pores. To use, just apply all over face or at targeted areas where you have larger pores or need a good cleanse, leave it on for a few minutes until dry and wash off. It is fairly easy to wash off and better off when removed with a wash cloth and followed up with a few splashes of cold water. While I do think that this is a great mask, it did leave my face quite sensitive - the redness from the strong nature of the mask lasted about 20 minutes or so before it completely went away. I also used a super rich moisturizer afterwards since my skin leans towards the drier side. Overall, a great mask to use for anyone who needs a super squeaky clean and a more refined, brighter looking skin.