Eversand Pads are reusable, washable and outlasts regular sandpaper 10 to 1! Use it wet or dry. Eversand Pads have two grits of sandpaper bonded onto a foam core. This means the sandpaper will be flexible and easy on your hands! This disk (280/400 grit) has a finer grit than the ES400 (100/220 grit).