Hog bristle (also called bristle) is a sturdy type of hair used for thicker paints, such as oil and acrylics. The hair is strong and resilient and leaves a visible brush stroke in the paint.
This set of three hog bristle brushes by Talens Art Creation is suitable for oil colour, acrylic and gouache. 
The set contains the following types and sizes: 3 round brushes in sizes 2, 6 and 10.