These products were originally sold separately. This version of the tank is no longer sold. Both are pre-owned SIZE S with light pilling but no major visible flaws besides that. They are both buttery soft 95% rayon 5% spandex. details about the shorts from Skims site: this boxer-inspired Sleep Short is a sleepwear essential. Designed with an elastic waistband, long inseam, and soft, stretchy composition, the Sleep Short is designed for a comfortable, relaxed fit.