If you’re more at home in the water than lounging beside it, then you’ll want to take this into account when choosing your swimwear. “Swimming in a one-piece is more practical than swimming in a bikini,” says Saperstein. “A one-piece has more coverage and can hold you in so you don’t need to worry about anything falling out.” For a quick dip, a bandeau swimsuit would be absolutely fine, but if you’re swimming more seriously, or diving, straps are a must to avoid a wardrobe malfunction. To feel secure and streamlined in the water look for the best one-piece swimsuits with wider straps and a high neckline. Detailing like bows, embellishments, and ties are unnecessary here and have the potential to hold you back or get caught, as for serious swimmers, what you're really looking for is to streamline your shape as much as possible, so you can glide through the water.