It is an evergreen, creeping off-shoot, perennial, herbaceous plant that reaches heights of growth of 15 to 30 (rarely to 45) centimeters. It is overall densely hairy. The leaves are up to 30 millimetres long and linear to lanceolate, which are covered with silky, silvery, frizzy and entangled hairs, forming like whitish felting. The inflorescences consist of up to 15 flowers. The calyx is 5 to 7 millimetres long. The petals are white and twice as long as the calyx. The teeth of the capsule are slightly bent outwards. The flowering period is from May to July in the northern hemisphere, but may also bloom at other times of the year.