A velcro cuff with an inner gaiter gives you a double-seal system at the wrist, which is the most effective way to keep snow, wind, and cold air out of your sleeves. The outer velcro lets you dial in the fit over your gloves, while the inner stretch gaiter sits snug against your skin as a second barrier.
The real game-changer is the thumbhole on that inner gaiter. It keeps the sleeve locked in place, so when you take a tumble or reach forward, your jacket won't ride up and expose your forearm to the snow. Once you ride with thumbholes, it's hard to go back.
This setup is ideal for all-mountain and backcountry riders, or anyone who rides in cold, deep-snow conditions where getting snow up your sleeves is a real risk. If you mostly ride mild resort days, a simple velcro cuff may be enough—but for serious protection, the inner gaiter is worth it.