| 摘要 |
A sports guard for fitting over the upper arch and teeth of a user is disclosed. The sports guard comprises broadly a base member of polyethylene and a layer of EVA encasing the polyethylene. The polyethylene and EVA show a surprising and unexpected affinity for each other. They are able to flex with each other and be heated and cooled without delaminating. This provides a solution to a longstanding problem in this art.
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