The basics Eliminates curling on golf shirt collars and keeps dress shirt collars, particularly button down dress collars fresh. The benefits Residue free adhesive. Remove and reuse 4-10 times. The uses CollarSTYX works for almost all shirt collars and can be trimmed to fit even the most unusually shaped collar. The bottom line Apply to underside of collar. CollarSTYX instantly presses your collar and keeps it that way all day. Remove before washing.