Reformation's viral "tennis set": a fitted square-neck crop top and a relaxed mini skirt with built-in shorts, in black with white contrast trim. The top has wide straps and works like a bra top. The fabric is a sleek, stretchy performance knit with a slight sheen. Reformation, Reformation Active, Adelina, EcoMove, tennis set, tennis skirt, pickleball outfit, black and white set, matching set, activewear set, crop top and skirt, skort, Euro summer outfit, TikTok viral, sporty chic