This unique new working surface introduced by Smile Line is constructed out of a synthetic hydrophobic material. Its low surface tension is “water repellant” and allows the porcelain grains to better stand together. The cellulose strips (hydrophilic) are inserted vertically into the slots of the mixing slab. This way, they can absorb the humidity from the reservoir and bring it onto the surface keeping your porcelain at the right consistency. Also, because of their vertical stable position, the strips help your porcelain mass to stay where it is instead of slipping away. Wet’O’Proof is available with Evo2 container or the original “Classic” container.