Montce Swim x REVOLVE Sandra Bikini Bottom in Chocolate. - size XS (also in L, M, S, XL) Montce Swim x REVOLVE Sandra Bikini Bottom in Chocolate. - size XS (also in L, M, S, XL) 95% recycled nylon 5% spandex. Hand wash. Adjustable sliding fit. Crochet knit fabric. Item not sold as set. MNTS-WX377. SANDRA. Montce's philosophy is that women should always feel chic, confident and comfortable. Designed to inspire confidence and compliments, Montce uses quality fabrics, nostalgic prints, and advanced construction details to make each bikini stand out. This effortless blend of style and substance, combined with an obsessive focus on fit, is what sets Montce apart.