This summer, the ’70s are calling. But these retro-leaning sandals might just persuade you to introduce a little disco-era glamour into your summer rotation: the perfect addition to jeans or the season’s essential slip skirt. Platform sandals and jeansJane Birkin. Jane Birkin wasn’t just a fan of ballet flats, she also loved a heeled sandal. Throughout the ’70s she regularly paired chunky platform sandals with bootcut denim and a crisp button-down shirt – a look that’s appearing on the runways at Miu Miu, Michael Kors and Fendi today.