Sensi Graves Swimwear Size Chart The Olivia one piece is business in the front and party in the back. Her silhouette builds off of the Emily one piece and offers classic coverage. However her back detail is fresh. Six straps cross to make up a beautiful statement piece. One-pieces stay put! Features: - Low V neck - Bra cups - Strappy back - UPF 50+ - Nylon/Spandex