Blue Builder's (formerly Wind-lock Brand) Small Red Z-Foam Block Sanding Sponge (Med/Fine 4in x 2-3/4in x 1in) features clog resistant technology and 4-sided brown aluminum oxide coating grit and can be used for wet or dry sanding.
Note: You may receive sponges with the old Wind-lock logo on them; this is while supplies last and will transition to Blue Builder sponges once existing inventory is exhausted.