Pin Up Swimwear Style - The Retro Halter is a vintage take on the classic Halter style. The Retro Halter features a tie around the neck for sizing adjustment. This Rockabilly swimsuit style is perfect for the woman who likes to show off her assets in only the way a classic pin up halter can provide, with modern fit and construction. This Pin Up swimwear style has a vintage boy cut leg; soft cups are available for an additional $3.