How Do Not Tumble Dry Works
The crossed circle is the dryer's gatekeeper: tumble heat plus agitation shrinks natural fibers, felts wool, and breaks structured garments (underwires, shoulder pads, interfacing). The practical translations: "dry flat" for knits (hanging stretches them wet), hang-dry for wovens, and patience — air-drying is slower and it is also why your favorite shirt still fits. The extra bars would say gentle; the cross says never.