Answer: sweatsuit

AnswerCrossword Clue
SWEATSUITSatchel item, at the gym
SWEATSUITTogs for the treadmill
sweatsuitA suit consisting of a sweatshirt and sweatpants, worn when exercising or as leisurewear
sweatsuita loose-fitting suit consisting of sweater and trousers, usually close-fitting at wrist and ankle, worn by athletes, etc