ZONE3 Unisex Buoyancy Shorts 1) For novice or intermediate level swimmers the major factor which prevents them from swimming faster is the lack of core stability and leg kick. Their arm strength and technique is good but because they are not horizontal on the top of the water they create a lot of drag and dead weight which makes it much harder to swim efficiently. With the buoyancy shorts the swimmer can get more used to swimming in the correct horizontal and streamlined position, so they start to build a neural pattern of how they should feel in the water. This also allows the swimmer to concentrate on making a more effective leg kick and better forward glide with each stroke without that sinking leg feeling. Results have shown that over time a swimmers body position, speed and endurance can be significantly increased. The shorts are best to be used only during certain swim sets rather than the full session. 2) For any level of triathlete who wants to train their open water swimming technique whilst in a pool. Swimming in a wetsuit during a triathlon is very different to swimming without a wetsuit during a swimming race. The majority of your power needs to derive from your upper body whereas your legs and core provide the essential control. These shorts help develop your open water swimming technique whilst in the pool where wearing a full wetsuit would either be too hot or banned by the life-guards. 3) For use in open-water training or races as an alternative to swimming in a full wetsuit (when the weather is warm enough!). Sizes available are XS, S, M, L and XL. Each set of short has a drawstring so they can be tightened to any waist size but we would recommend the size X-Small for waist sizes 26 28, Small for 30-32, Medium for 32  34, Large for 34  36 and XL 36-38.