adidas by Stella McCartney Fitsense Tight in Black. - size S (also in L) adidas by Stella McCartney Fitsense Tight in Black. - size S (also in L) 79% poly 21% elastane. Banded stretch waist. Perforated areas. Stretch fabric and fit. Imported. ADID-WP114. EA2147. Adidas by Stella McCartney offers women cutting age sports performance clothing they can work out in while still feeling good about the way they look. Not compromising style for performance, the balance is struck between fashion and sport.