adidas by Stella McCartney P Ess Tight in Blue. - size XS (also in L) adidas by Stella McCartney P Ess Tight in Blue. - size XS (also in L) 85% recycled poly 15% spandex. Elasticized waist. Contrast mesh panel accents. Side tonal mesh striping with logo detail. Back zipper pocket. Banded leg openings. Stretch fit. Imported. ADID-WP104. DT9311. 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.