Lilly Pulitzer Randee Rashguard One-Piece Swimsuit. Sun Protection: This style often includes UPF 50+ sun protection, making it ideal for water activities and extended time in the sun. Material: shell- 75% Nylon 25% spandex; lining- 93% polyester 7% spandex Coverage: The design provides long sleeves, a crew neck, full top, and bottom coverage with a sleek, slightly high-cut leg. Size 16, no flaws.