Hat traction sweatband

1. An anti-slip sweatband for a hat, the sweatband comprising:

a flexible collar for fitting onto the head of a wearer and for forming a substantially oval opening for the head of the wearer when said collar is mounted into the interior of a hat,

said collar having a height, a front, a rear opposite to said front, an interior and an opposite exterior, and a circumference, wherein an exposed surface of said collar extends around said circumference on said interior of said collar, and a back surface, opposite to said exposed surface, extends around said circumference on said exterior of said collar, whereby when said collar is mounted in the hat and the hat worn on the head of the wearer, said exposed surface of said collar is in contact with the head of the wearer including the forehead of the wearer,

said front having at least one aperture formed therein, wherein said at least one aperture has a circumferential edge extending completely therearound and wherein said at least one aperture is positioned to extend between, and cover at least, laterally spaced apart sides of a radial sector covering substantially a frontal one third of said circumference, said frontal one third corresponding to said front of said collar,

a flexible resilient sheet mounted to said back surface of said collar so as to cover said aperture in said front of said sweatband, wherein said resilient sheet is mounted around said circumferential edge of said aperture so as to draw said sheet against said circumferential edge and so as to urge said sheet into said aperture and wherein said sheet is thereby bowed into and across said aperture to extend an interior surface of said sheet, corresponding to said interior surface of said collar, in a convex curvature which is flush with said circumferential edge around said circumferential edge and elevated from said circumferential edge so as to contact the forehead of the wearer in a band extending across said aperture,

wherein said sheet is mounted to said circumferential edge of said at least one aperture by stitching around said circumferential edge,

wherein said stitching includes extending said stitching onto said interior surface of said sheet exposed through said at least one aperture and onto said collar around said circumferential edge of said at least one aperture, whereby said stitching draws said sheet against said circumferential edge and urges said sheet into said aperture wherein said sheet is thereby bowed into and across said aperture to form said convex curvature of said interior surface of said sheet in said at least one aperture.

2. The sweatband of claim 1 wherein said circumferential edge is beveled on at least said exposed side of said circumferential edge to thereby form a smooth transitional surface from said circumferential edge onto said interior surface of said sheet in said at least one aperture.

3. The sweatband of claim 2 wherein said sheet is adapted to exhibit a tackiness on said interior surface of said sheet.

4. The sweatband of claim 3 wherein said sheet is adapted to exhibit increased tackiness upon dampening of said interior surface of said sheet by perspiration moisture.

5. The sweatband of claim 4 wherein said interior surface of said sheet is uneven so as to apply an increased point pressure against the forehead of a wearer upon wearing of said sweatband by the wearer.

6. The sweatband of claim 5 wherein said sheet is made of a cushioning material.

7. The sweatband of claim 6 wherein said sheet is made of a foamed material.

8. The sweatband of claim 7 wherein said sheet is made of neoprene.

9. The sweatband of claim 8 wherein said sheet is mounted to said circumferential edge of said at least one aperture by stitching around said circumferential edge.

10. The sweatband of claim 2 wherein said stitching includes cross-stitching.

11. The sweatband of claim 10 wherein the forehead of the wearer has prominent sides and wherein said at least one aperture includes at least a pair of apertures spaced apart by substantially said radial sector, whereby said apertures overlay the prominent sides of the forehead of the wearer when the sweatband is worn by the wearer.

12. The sweatband of claim 10 wherein said at least one aperture is a single aperture which extends substantially entirely across said radial sector of said front.