Callahan V Neck Maxi Dress in Navy. - size XS (also in ) Callahan V Neck Maxi Dress in Navy. - size XS (also in ) Cotton blend. Hand wash cold. Unlined. Knit fabric. Side seam slit. CAHN-WD21. 81717. 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.