Throwback Thursday with a touch of pure elegance. Irving Penn’s lens, Vogue’s vision, and a moment of beauty that never fades. ••• #repost @voguemagazine How often should you wash your hair? It’s a surprisingly hot topic, with some swearing by once a week and others insisting on more frequent washes. Tap the link in our bio to find out what the experts say. Photographed by Irving Penn for Vogue, October 1986