Winton brushes are made from quality hog bristles, hand-set into corrosion-resistant ferrules. The natural curve of the hog bristle produces a resilient brush which retains its shape even after heavy use, allowing the artist more control and accuracy, whether painting with oil, alkyds or acrylics.The5-Brush Zipper Setincludes round 6, filbert 6, flat 6, bright 8 and fan 3.