Once shunned by skincare pros as too abrasive, cleansing bars are having a resurgence. The latest formulas are gentle, nourishing, and hailed for their sustainability, typically lasting longer than bottled cleansers and creating far less packaging waste. “In the past, soaps had high pH levels and were made with alkaline and harsh detergents that stripped skin of its healthy oils, leaving it dry, itchy, and irritated,” says Dendy Engelman, M.D., a board-certified dermatologist in New York City. “Today’s bars have balanced pH and contain moisturizing oils and soothing extracts to cleanse without compromising the skin barrier.” (If you have dry or sensitive skin, stick with bars labeled “soap-free.”) For the face, Dr. Engelman recommends formulas with calming extracts like green tea, rose, and aloe vera plus hydrating oils such as…