20 Common Bikini Gripes — We Solved 'Em... If your bikini is always coming untied... Forgo strings and hooks altogether. Opt for swim pieces you can slip on instead of tying or clasping. Mara Hoffman Jacquard Racerback Bikini Top, $110, available at Madewell; Mara Hoffman Jacquard High-Waisted Bikini Bottom, $104, available at Madewell.