| 摘要 |
A sports headgear apparatus includes a head covering that has a concave inner surface and a convex outer surface. The head covering comprises a panel that has a substantially semi-spherical shape. The panel has a bottom perimeter edge defining an opening into the head covering. A perimeter tube is attached to and is coextensive with the bottom perimeter edge. The tube is substantially airtight. A canister having compressed air therein is fluidly coupled to the tube. A pressure sensitive valve is fluidly coupled to the to canister and opening the canister when the pressure sensitive valve detects a predetermined water depth.
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