Bikini briefs by Bikini Lab, Stretch swim fabric, Metallic finish, Cut-out sides, Brief cut, Hand wash, 87% Polyester, 13% Spandex, Our modal wears a UK S/EU S/US XS. Give your swimwear a lift with Bikini Lab's lingerie-inspired collection. Pulling inspiration from pop art, music and culture, the label brings the bedroom beachside with color-pop push-up styles, underwire bra tops and adjustable hipster briefs.