NWT Billabong Size Large One Piece Swimwear! Take tan lines back to ‘73 in this retro striped bikini. Saturated in seventies tones, the one piece swimsuit delivers on long lines with a vertical stripe and scooped-out back cut. A Biarritz cut at the back offers slim seat coverage Scooped neckline. Deep scoop back. Biarritz coverage. Slim bum coverage. 86% Polyamide, 14% Elastane