Dermastir Collagen Post-Filler is applied onto wrinkles to diffuse them out. This filler can be applied on all types of wrinkles: forehead wrinkles, wrinkles around the eyes, laugh line wrinkles, furrows and vertical lines around the mouth. Dermastir Collagen Post-Fillers are primarily wrinkle reducers that correct moderate to deep facial wrinkles and folds such as those around the nose and mouth (nasolabial folds)