Sanding Pads by Annie Sloan.
These come in a package of three. The top sponge is blue and it is the course. The red sponge in the middle is a medium grit and the green sponge is the fine grit. They are reusable! Once you have saturated the sanding sponge, wash it well with a little warm water and a small drop of dish soap.
They are awesome used both either when dry or do a wet distress with them.