Green Clean Vario Brush is a goat hair brush which is particularly soft and adjustable in two positions. The first position is 19mm in length and is a firm brush and the second position is 34mm in length and is rather soft. You can choose either position to suit what optics need cleaning. It provides an anti-static effect adn the brush is retractable and therefore protected inside the handle. It can be washed with baby shampoo and lukewarm water.