BEST FOR: All-day pedaling on dirt. THE TEST: The pair pictured have standard lenses, which we liked, but testers preferred the photochromic ones ($90; white frames only), which adjust from early-morning murk to afternoon radiance and are polarized for glare. The brown tint snaps up depth and detail, the better to read trails in a hurry, and the lenses multitask as structural elements, so there’s nothing extra to weigh you down. This frameless design, best on small and medium-wide faces, is a great multisport performer, but the functional mix is especially right for mountain biking. THE VERDICT: High marks for comfort and value, but stylewise, the money you didn’t spend shows.