High fashion design meets sporty styling in this No. 21 sweatshirt top. Cozy fleece fabric shapes an asymmetric neckline that ties elegantly at the back for an elevated take on athleisure.. Self: 100% cottonContrast: 69% acetate 31% silk. One shoulder styling. Neck tie accent. Banded hem and arm openings. NO2R-WK4. E071 4014 9000. With a keen eye for trends of the moment, No. 21 offers a modern wardrobe of timeless sophistication with a refreshing flair of striking playfulness. Designer Alessandro Dell?Acqua mixes feminine and masculine shapes into preppy, cool luxury pieces imbued with the innate sense of Italian femininity and style. The collection features immaculately tailored and demure silhouettes accentuated with eye-catching embellishments.