Finding it difficult to keep your collar tight and crisp? Look no further. These little guys will keep your collar problems under control. No more flat, blunt collars. These guys keep them fresh even after dry cleaning. Easy to use. Peel off one side, stick it on the collar, peel off the other side and pinch the collar. Boom, lasts all day. It was a bit tricky to remove and I probably wouldn't try anything other than cotton for fear they might damage the shirt.