Solid & Striped The Cassidy Dress in Black,White. - size XL (also in L, M, S, XS) Solid & Striped The Cassidy Dress in Black,White. - size XL (also in L, M, S, XS) 95% polyester 5% spandex. Hand wash. Unlined. Hidden side zipper closure. Side seam pockets. Midweight seersucker fabric. SLST-WD137. SU25-R3358GIN-NR. Solid & Striped was established in New York in November of 2012. Their mission is to design and produce a timeless collection of Swim and loungewear that is made with the highest quality European and Japanese fabrics available. Each item is defined by an elegant simplicity that makes each piece essential to a classic wardrobe.