Gaiters are the perfect companion for your boots to keep unwanted snow, water, and debris out. You'll find people wearing gaiters on anything from backcountry trails to cold winter mountains. They should be considered an essential item for any winter travel or climbs.
Backpacking gaiters are short, lightweight, and breathable. Their main purpose is keeping rock, debris, and minor snow and rain out of your boots. With such thin materials you won't even remember you are wearing them. However, this type of gaiter will not hold up to extended snow exposure and tend to be less durable.