Alexander Wang debuted a collection for H&M that was both street-inspired and sport-based — the sport of boxing, in particular. Free from the constraints of tailoring, the almost entirely black men’s and women’s pieces either clung to models’ skin, as in logo-splashed gym tights, or formed a cocoon around them, as in neoprene sweatshirts.

A wide array of accessories and personal objects including a yoga mat, towels, a water bottle, and goggles were certainly not left out. These looks were essentially stripped-down staples and high-functioning hybrids that will probably do very well when they go on sale November 6, even if the notion of fast-fashion collaborations has, at this late stage, lost some of its luster.

Which is surely why Wang arranged for a festive environment in the vast Fort Washington Avenue Armory in Upper Manhattan that harked back to the mid-aughts, when his elaborate after-parties were the stuff of legend. And so, following the runway show, rapper Missy Elliott performed retro classics Get Ur Freak On and Work It, along with her protégée Sharaya J., to a crowd that included Solange and Jessica Chastain. Wang, as he’s wont to do, danced onstage.

Missy Elliott

Solange, Jessica Chastain

Mary J. Blige, Eddie Redmayne