| 摘要 |
A helmet is provided, having a vent assembly allowing fluid communication between an exterior of the helmet and an interior of the helmet. The vent assembly includes an open-ended elongated sleeve disposed on a frontal portion of the helmet, with the sleeve being in fluid communication with at least one aperture passing through to the helmet interior. In one embodiment, the elongated sleeve includes a first wall having at least one aperture therethrough, a second wall spaced from the first wall and having at least one aperture therethrough, at least one closed edge, and at least one open edge, defining an internal lumen. The at least one first wall aperture, at least one second wall aperture, and at least one inner shell aperture cooperate to allow fluid communication between an exterior and an interior of the helmet. An insert slidably receivable within the elongated sleeve lumen is provided.
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