Old Navy String Bikini Swim Bottoms When you spot something as special as a bandana-patterned Old Navy String Bikini Swim Bottoms ($10, originally $20), you may just overlook the classic black option that's also available in this and the partnering Old Navy Tie-Strap Bikini Swim Top ($13, originally $25), too. Image Source: oldnavy.gap.com Old Navy String Bikini Swim Bottoms $10 from oldnavy.gap.com Buy Now Old Navy Tie-Strap Bikini Swim Top $13 from oldnavy.gap.com Buy Now