This is especially useful for professional cyclists and runners. Lenses these days are also vented so as to maintain air circulation which prevents fogging and the consequent blurry vision.
<a href="https://www.dbselettronica.it/foro/fpdb/d0lupwyj.asp" ></a>
[url=https://www.dbselettronica.it/foro/fpdb/d0lupwyj.asp][/url]