Look for sports bra tops made of polyester, nylon and spandex blends to provide ultimate fit and moisture-wicking capabilities. Since these tops do dub as a shirt and sports bra in one, it's really important to get the right fit. Make the effort to try on a few first. Try aerobic movements such as jogging in place, or do a few jumping jacks to get an idea of the top's capabilities.

Sports Bra Trend You Gotta Try: Nike Airborne Long Women's Sports Bra

This top is made for medium impact workouts, like spin or step classes. With an internal support frame for extra "holding power," and a mesh bra lining, this double-duty top features a racer-back and back panel. Bra cups are made of Nike's DRI-FIT fabric, with 94% polyester, and 6% spandex. Tops are 2-toned in color, and even have a utility shelf to clip your iPod. Choose from color combos like ink and hot lime or deep burgundy and challenge red. $45

Sports Bra Trend You Gotta Try: Athleta Seamless Wave Bra Top

If you're still convinced you need a bit more support, you may like the seamless wave bra top from Athleta. It's soft and lightweight, so you won't even know it's there. The bra is the ultimate in functionality, with an adjustable lingerie strap and a back hook, if you like more of the racerback feel. Shirring adds support, and bra cups are removable, if you don't want the extra shaping or coverage.

This bra works for training at the gym, exploring your nearby hiking trails and even for trips out to the grocery store. As with any athletic wear worth its snuff, the bra top is made of a trademarked Meryl skinlift fabric with nylon, polyester and spandex. It comes in 3 color combos: black/ice, raspberry/camelia and gem blue/porcelain. $34