The unique shape and exclusive material ensure impeccable, streak-free application with minimum product waste. This makeup sponge features an open cell structure that fills with small amounts of water when wet. This allows the sponge to be full so that the makeup product sits on top of the sponge rather than being absorbed, allowing you to use less product each time. It is used best with liquids, such as liquid primers, foundation, moisturizers, concealers, BB creams. It is perfect for applying eye and under-eye concealer.