Time trial bicycle helmet with ear shield

1. A helmet, comprising:

a helmet body comprising a front portion, a tail portion, and a plurality of body magnets, each body magnet comprising either a permanent magnet or a ferromagnetic material;

a shield comprising a plurality of shield magnets and two ear shield portions connected by a brow portion extending across the front portion of the helmet body, each shield magnet comprising either a permanent magnet or a ferromagnetic material, wherein the shield is releasably coupled to the helmet body by magnetic attraction between the plurality of body magnets and the plurality of shield magnets;

wherein the helmet body and the shield are configured such that a majority of an ear of a helmet wearer is exposed with respect to the helmet body and covered with respect to the shield and wherein the helmet body comprises one or more indentations that are sized to receive one or more shield magnets in the plurality of shield magnets when the shield is coupled to the helmet body, such that the shield sits flush with the helmet body.

2. The helmet of claim 1 , wherein the one or more indentations or at least one body magnet in the plurality of body magnets is located in a lip of the helmet body.

3. The helmet of claim 1 , wherein the shield comprises a magnetic slot configured to couple the shield magnet to the shield.

4. The helmet of claim 1 , wherein the tail portion is tapered and the front portion has a rounded leading edge, such that the helmet body has a tear drop form factor.

5. The helmet of claim 1 , wherein the plurality of body magnets and the plurality of shield magnets are aligned with respect to each other when the shield is coupled to the helmet body.

6. The helmet of claim 1 , wherein the shield extends from the front of the helmet to a side rear portion of the helmet to thereby cover ears of the helmet wearer.

7. The helmet of claim 1 , wherein the shield is part of a one-piece design that wraps around to side portions of the helmet to cover ears of the helmet wearer and shield eyes of the helmet wearer.

8. A helmet, comprising:

a helmet body comprising a front portion, a tail portion, and a plurality of body magnets, each body magnet comprising either a permanent magnet or a ferromagnetic material; and

a shield comprising a plurality of shield magnets and two ear shield portions connected by a brow portion, each shield magnet comprising either a permanent magnet or a ferromagnetic material, wherein the shield is releasably coupled to the helmet body by magnetic attraction between the plurality of body magnets and the plurality of shield magnets;

wherein the helmet body and the shield are configured such that a majority of an ear of a helmet wearer is exposed with respect to the helmet body and covered with respect to the shield and wherein the front portion of the helmet body extends farther forward than the shield such that the front portion of the helmet body at least partially overhangs the shield.

9. The helmet of claim 8 , wherein an outer surface of the brow portion of the shield is recessed with respect to an outer surface of the front portion of the helmet body such that at least part of the helmet body overhangs the brow portion of the shield.

10. The helmet of claim 8 , wherein an outer surface of the two ear shield portions is flush with an outer surface of the tail portion of the helmet body.

11. The helmet of claim 8 , wherein the plurality of body magnets and the plurality of shield magnets are aligned with respect to each other when the shield is coupled to the helmet body.

12. The helmet of claim 8 , wherein the helmet body comprises one or more indentations that are sized to receive one or more shield magnets in the plurality of shield magnets when the shield is coupled to the helmet body.

13. The helmet of claim 8 , further comprising a shield vent at a top edge of the brow portion of the shield that is separated from a corresponding portion of the front portion of the helmet body to leave an opening between the brow portion of the shield and the front portion of the helmet body when the shield is connected to the helmet body.

14. The helmet of claim 8 , wherein the brow portion of the shield comprises an eye shield that extends downward from the brow portion and is configured to cover at least the eyes of the helmet wearer.

15. A helmet, comprising:

a helmet body comprising a front portion and a tail portion; and

a shield comprising two ear shield portions connected by a brow portion, the shield extending from the front portion of the helmet to a side rear portion of the helmet;

wherein the shield is releasably coupled to the helmet body by a plurality of magnets and wherein the helmet body and the shield are configured such that a majority of an ear of the helmet wearer is exposed with respect to the helmet body and covered with respect to the shield.

16. The helmet of claim 15 , wherein the shield is part of a one-piece design that both shield the eyes and wraps around to side portions of the helmet to cover the ears of the user.

17. The helmet of claim 15 , wherein the tail portion is tapered and the front portion has a rounded leading edge, such that the helmet body has a tear drop form factor.

18. The helmet of claim 15 , wherein the shield is recessed with respect to a front-most part of the front portion of the helmet body such that at least part of the helmet body overhangs the brow portion of the shield.

19. The helmet of claim 15 , further comprising one or more vents formed along a top edge of the shield between the brow portion of the shield and a brow of the helmet body.