De Soto Speedtube 5 and Speedvest
$220 and $180 (respectively), Desotosport.com
The draw: Great for warm-water swims
The benefit of De Soto’s two-piece design is greater freedom of movement. The Speedvest is 2mm thick, so it doesn’t provide much warmth or buoyancy, making it ideal for warmer triathlon swims that are still wetsuit-legal. The Speedtube supplies more buoyancy (5mm thick) than the top and can be worn alone and utilized as a training tool in the pool when you want to focus on proper body positioning, specifically getting the legs to not sink.