Girls Tie Knot Bikini Plain Tie Knot Sexy Bikini Set. Front tie knot with high leg bikini set. Sirene LaVie Floral Front Tie Knot Bikini Swimsuit W.T.I. Design. Plain Tie Knot Sexy Bikini Set. Experience both style and comfort with our Plain Tie Knot Sexy Bikini Set. The high quality fabric ensures long lasting durability while maintaining a sleek and flattering fit. It's the perfect addition to your swimwear collection for a confident and elegant look. Available in GREEN & RED colors.