Layering done right, No. 21's Sweatshirt merges high-class with casual. A classic sweatshirt cut is elevated by a cotton underlay and back to create a look that's effortless and comfortable.. 100% cotton. Dry clean only. Banded edges. Contrast woven fabric. NO2R-WK2. E021 4171 1101. 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 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.