Maternity bikini briefs by ASOS Maternity Designed to fit through all stages of pregnancy Made from a stretch swim fabric Low rise to sit under your bump Folded, ruched contrast waistband ABOUT ASOS MATERNITY Stay chic throughout your pregnancy with the ASOS Maternity collection. Flatter your bump with gorgeous maternity dresses, jeans, tops, pants and more, cleverly designed to accommodate your new curves. Combining the stylishness of our mainline collection with pregnancy-friendly features such as soft ruching, adjustable fastenings and flexible waistbands, our versatile maternity wear is the perfect fusion of fashion, comfort and a flawless fit.. Main: 81% Nylon, 19% Elastane Lining: 100% Nylon. Machine Wash According To Instructions On Care Label.