File indicated to mattify and smooth the surface of the natural nail evenly. The special and innovative sponge material makes the buffer ideal for delicate use and can be washed and disinfected at each treatment. The special rounded shape on the sides facilitates its use even on the most difficult nails. As the buffer is particularly delicate, it eliminates the risk of cuts and wounds. It has a special ergonomic shape that facilitates the work of smoothing the processing and opacifying the nail plate.