Every morning, Carly Cardellino drags the sisal bristles of a dry brush all over her body. They swish along her arms in swift staccato motions, climb up her legs and backside and then slide down her stomach from ribs to groin. On Instagram, she has immortalized the routine in a reel pinned to the top of her profile. “The ONE beauty thing I swear by that made/makes a huge difference in the tightness of my skin postbabies; lymphatic drainage,” she wrote in the video caption.