Callahan X REVOLVE Sami Dress in Mint. - size XS (also in S) Callahan X REVOLVE Sami Dress in Mint. - size XS (also in S) 62% cupro 38% tencel. Made in China. Hand wash. Unlined. Pull-on styling with elastic waistband and attached wrap tie. Surplice neckline. Satin jacquard fabric. CAHN-WD52. 91924. Los Angeles based brand Callahan is known for their comfy sweaters and perfect boyfriend fits. Their line is elevated by unique textures, materials, and techniques that give each piece versatility and wearability. Designed for cool girls everywhere, Callahan is inspired by effortlessly easy style.