Very gently used kids swim fins in size XS. Fits kids 12-5-1. 【Easier to Kick and Less Fatigue】Short fins are best for most snorkelers becasue they’re easier on your leg muscles. You don’t need as much power with each stroke, and each stroke will be shorter relative to using longer fins. Even though short fins generate less thrust, speed shouldn’t be a top priority for most snorkelers. You`ll be chilling at the surface most of the time, not swimming long distances through strong currents. Easy to Practice With in a Pool】Many casual snorkelers will be accustomed to a swimming flutter kick, which requires short and fast strokes. That means kicking with a short fin will feel more familiar, and thus easier to get used to.In fact, short fins are a great way to train your legs for the flutter kick and are routinely used by swimmers for this purpose. 【Easier to Travel With】Traveling by air is much more of a hassle than it used to be. Many airlines now have increased restrictions on baggage size and weight.Short fins under 25inches are much easier to travel with as a result. 【Less Likely to Accidentally Kick Coral, Sea Life, and Other Snorkelers】Beginners can be clumsy with their feet while learning to kick. New snorkelers and divers, however, will find it much easier to maneuver in short fins. That means a short fin will decrease your chances of kicking coral, wildlife, and even your fellow snorkelers!