By now, you\u2019ve probably heard of a konjac sponge\u2014or, at the very least, seen one on your Instagram feed or in the aisles of Sephora. The squishy, teardrop-shaped sponge has been hailed as a game-changing skincare tool over the last few years, especially for anyone with sensitive skin, but...why? What is it, exactly? What does it do? And most importantly, how does one use it?Well, good news: Today\u2019s the day you find out and revolutionize your beauty game. Because I\u2019m breaking down every possible thing you\u2019ve ever wanted to know about your skin\u2019s new BFF, so you can get ultra-smooth, bright skin (spoiler: that\u2019s a thing konjac sponges do for you!) fast, without spending a ton of money.What Is a Konjac Sponge?Despite its name, it\u2019s not at all like the sponge you keep on your kitchen sink. It\u2019s a sponge that\u2019s made from the root of a konjac plant (a porous vegetable that grows in Asia), which is why it feels almost rubbery once it gets wet. It\u2019s 100-percent natural and plant-based. What Does It Do?Konjac sponges don\u2019t have any magical ingredients that turn your skin into a shiny little pearl, but that\u2019s not really the point of them\u2014they\u2019re meant to be used as an incredibly gentle exfoliator that\u2019s safe on virtually all skin types (though anyone with rosacea or perioral dermatitis should still consult their dermatologist, first).\u201cI\u2019m kind of obsessed with them\u2014they\u2019re so soft,\u201d says dermatologist Mona Gohara, M.D., associate clinical professor at Yale University. \u201cIt\u2019s hard to find an exfoliant that\u2019s not even somewhat irritating, but these sponges are honestly gentle.\u201d They work to slough off dry patches and flakes, leaving your skin brighter, softer, and smoother, without feeling the least bit raw. How Do You Use It?Some konjac sponges come packaged in moist little packets (you may even see condensation on the inside of the plastic, which is totally normal), which means they\u2019ll be ready to use as soon as you rip off the seal. If your Konjac sponge is dry and hard, though, soak the sponge for 5\u201310 minutes until it expands and fully softens, then squeeze out the excess water right before you use it.Once your sponge is ready, drizzle face wash over the sponge and gently massage your face in circular motions until your skin is clean and your makeup is removed. If you don\u2019t like the idea of really buffing your cleanser into your skin, you can always rub it over your damp skin after cleansing it to pick up excess skin cells. Then rinse out the sponge and hang it (or stand it up) to air-dry over night.How Long Do They Last?Even though some of konjac sponges are antibacterial, meaning they won\u2019t grow a bunch of nasty germs while you sleep, all of them still need to be replaced after a month just to be safe. I mean, you are rubbing a moist plant over your dirty face every night, so you\u2019ve got to expect some limitations. Which Color Konjac Sponges Should I Use?Any! Though the classic konjac sponge is dark-gray or black and is infused with charcoal, don\u2019t expect it to work like a classic charcoal skincare product. \u201cAny of the additional ingredients, like charcoal or clay, aren\u2019t touching your face long enough for them to have any effect on your skin,\u201d says Dr. Gohara. Which means that even though, technically, different-colored konjac sponges are said to be infused with skin-specific clays (like green clay for oily skin, pink clay for sensitive skin, etc.), they\u2019ll all do the exact same thing to your skin when you use them. So don\u2019t get too hung up on the differences, and instead just grab a sponge and test it out. Your skin will thank you for it (or, at the very least, not hate you for scrubbing it raw).