The M5 and smaller M5.S are the two newest additions to Anon’s longstanding “M” series of magnetic goggles, which have long been a big hit with our reviewers. Historically, the numbers in those goggles’ names corresponded to how large they were, but the M5 bucks that — it’s smaller than the Anon M4, slotting between that and the M2 in terms of overall size. However, Anon also offers the M5.S, which we’ve also been testing and is a better choice for folks with fairly small faces.