The hole above the adjustable strap isn't for your hair; it's there to facilitate the creation of OSFM hats. Our patented magnetic seam has been designed to accommodate both thick and thin hair! The magnetic seam can easily adapt to high and low hairstyles, eliminating the need for fussing or constant adjustments. Gone are the days of buttons, snaps, and velcro! Enjoy a well-made hat available in seven sizes to fit you perfectly!