This is a double-sided wave sponge that can be used and washed separately in one wash.
The "Big Wave Processing Surface (Black)" is made with a fine and soft sponge that reduces friction and creates an abundance of foam that gently cleans the body.
The "Small Wave Processing Surface (Gray)" is a sponge with moderate elasticity that cleans dirt from the grille and the body clearly.
By combining two types of sponges with different firmness, it has a moderate grip that is easy to clean, and the side cut makes it easy to hold and a generous size allows you to quickly wash minivans and large cars.