Balenciaga Black Nylon One Piece Swimsuit Balenciaga Y 3 Green Nylon One Piece Swimsuit Y 3 One Piece Short Sleeve Stylish Nylon High Elasticity Swimsuit With MOW Classic One Piece Swimsuit for Women Lapis. The nylon One piece swimsuit by Ami Paris features an essential and contemporary silhouette. Crafted from nylon, the design is defined by its two tone look and a low cut back that enhances the silhouette. The tonal lining ensures comfort and fit, while the Ami de Coeur metal plate at the back adds a distinctive and iconic detail.