Hydro-activated sponge grows to about twice its size when wet, and absorbs minimal product so your favorite formula lands on your complexionâ??not your sponge. When wet, the super soft material provides an even, smooth blend and bounce. The large, rounded surface area ensures a quick application while the contoured tip offers precision. Blender has chosen to use non-toxic, water-soluble dyes. For this reason, your blender may shed dye for the first couple of washesâ??similar to a pair of blue jeans. Once you squeeze the water out of the blender, the excess dye is removed as well. The dye does not transfer to the skin.