Madewell - Madewell Second Wave Square-Neck Tank One-Piece Swimsuit. Color True Black. Low Stock. On sale for $52.12. MSRP $69.50.. 1.0 out of 5 stars2 left in stockBrand NameMadewellProduct NameMadewell Second Wave Square-Neck Tank One-Piece SwimsuitGenderWomen'sColorTrue BlackPrice$52.12MSRP: $69.50