| 摘要 |
A cap includes a hemispherical portion, a visor portion, and an elastic band attached to the bottom peripheral portion of the hemispherical portion, to resiliently engage onto the heads of the users, and to adjustably accommodate a number of various sized heads. The elastic band includes a number of elastic straps and a number of cloth straps alternatively arranged and secured to each other. The elastic straps are made of resilient materials to resiliently engage onto the heads of the users. The cloth straps include a stretchability less than that of the elastic straps, to allow the elastic band to be mostly stretched circumferentially at the elastic straps, and to allow air to ventilate into and out of the cap.
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