The most bristles with 8 rings of boar bristle & nylon tufts. This military version does not have a handle and the brush pad is the largest of the brushes. The boar bristle/nylon mix is recommended for normal to thick hair while the popular size is recommended for medium to long length hair. The single spike of nylon facilitates the boar bristle getting to the hair and scalp by creating separation for the bristle to come through.The brush halpes clean hair while stimulating the skin for healthier and happier hair. Size: 5 inches long and 3 1/4 inches wide.