-A waterproof, perfectly designed makeup brush -Helps evenly apply liquid & gel serums onto skin -The layers of extra-soft SigmaTech® fibers vary in length -Allows for a gentle & beautiful application every time -Made of exclusive synthetic anti-microbial fibers -Ferrules use durable, corrosion-resistant SigmaAlloy™ & exclusive, patented interlocking technology -Solid polymer-based handle is sleek, waterproof & durable -Free of latex, BPA & lead Product Line: S10 Serum Brush