Lilly Pulitzer UPF 50+ Sophiletta Dress in Light Lilac Trunks In The Air, Size S. In excellent, preowned condition. The Lilly Pulitzer UPF 50+ Sophiletta Dress is crafted with Solsafe fabric which is a machine washable, cotton-like knit that boasts a UPF 50+ rating, and features a gorgeous print that's perfect for the season.