Hii.. Rev. Cleanhead, i understand the problem you are facing with your polo shirts. As we know, curled collar ruins the overall feel of the attire and many times, we get annoyed by something like curled up collars. But now, you can get rid of this difficulty and say bye bye.. to curled collars with sports collars stays or Hulas. These collar stays are specially designed for polos and sports shirts. Simply stick them beneath the polo collars and you will get straight collars within few seconds.