Claims

1. A cap with an opening for the passage of hair comprising: a crown with a bill generally located at the front of said crown; an opening in the rear of said crown, said opening being bordered on the bottom by an adjustment device; and said opening being positioned in said crown so as to coincide with the location at which an accumulation of hair on the back of the wearer's head departs said wearer's head.

2. The cap of claim 1, wherein said cap is a baseball style cap.

3. The cap of claim 1 wherein said opening is configured in the shape of an inverted U.

4. The cap of claim 1 wherein said opening is configured in the shape of an inverted C.

5. The cap of claim 1 wherein said opening is configured in the shape of a star.

6. The cap of claim 1 wherein said opening is configured in the shape of a triangle.

7. The cap of claim 1 wherein the top of said opening is no greater than approximately 14 cm from the bottom of said crown and the width of said opening is between approximately 3 cm and 12 cm.

8. The cap of claim 1 wherein the circumference of the bottom of said crown is between approximately 55 cm and 57 cm.

9. A cap with a single in the rear of said cap opening for the passage of hair comprising: a cap with a crown wherein said cap is sized smaller than conventionally sized caps so that said cap is positioned higher on the wearer's head when worn; an opening in the rear of said crown, said opening being bordered on the bottom by an adjustment device; and said opening being positioned in said crown so as coincide with the location at which an accumulation of hair on the back of wearer of said cap's head departs said wearer's head.

10. The cap of claim 9 wherein said cap is a baseball style cap.

11. The cap of claim 9 wherein said opening is configured in the shape of an inverted U.

12. The cap of claim 9 wherein said opening is configured in the shape of an inverted C.

13. The cap of claim 9 wherein said opening is configured in the shape of a star.

14. The cap of claim 9 wherein said opening is configured in the shape of a triangle.

15. The cap of claim 9 wherein the top of said opening is no greater than approximately 14 cm from the bottom of said crown and the width of said opening is between approximately 3 cm and 12 cm.

16. The cap of claim 9 wherein the circumference of the bottom of said crown is between approximately 55 cm and 57 cm.