Over the years, the casual dressing attire has become commonplace for workwear, leisure, and workouts alike. But despite how flexible and stretchy they are, unfortunately they aren’t invincible (RIP to my many pairs that have pilled and stretched to the point of no return). Since we all want to know how to expand our leggings’ lifespan, we asked some of our favorite laundry connoisseurs—Gwen Whiting and Lindsey Boyd, co-founders of The Laundress, and Val Oliveira, founder of Val’s Services—for some insider tips on how to make leggings last as long as possible.