It is highly flexible so it easily adapts to contoured and curved surfaces as well as having a coating that resists clogging while sanding. Excellent clog resistance Great for sanding between coats Adaptable to curved and contoured surfaces Grit Chart P180 - Fine - Final sanding before work is finished P240 - Extra Fine - Use between coats of paint or varnish for perfect finish P320 - Extra Fine - Use between coats of paint or varnish for perfect finish.