Imagine a dehydrated dome of sponge cake and you're somewhere close to this kooky sponge's texture. Made from natural konjac root (a porous vegetable that grows in Asia), konjac sponges were first created as a way for Japanese farmers to cleanse a baby's skin, so they're a much gentler way to exfoliate dead or dry skin during your daily face wash. TIP: Konjac sponges harden when dry, so simply let them soak in the shower or sink for a minute to soften them up before using.