J.Crew Shiny Squareneck Bikini Top. Super cute. Worn a couple times but in great condition. Size S. Best thing on the beach: this classic sports bra-inspired bikini top in our new slightly shiny, definitely slinky swim fabric. Poly/elastane. Our swimsuits are machine washable, but we recommend hand washing, as it helps keep the fabric and shape of the suit looking newer, longer.