If you've been doubtful about Birkenstock-inspired pool slides are this Spring's biggest accessory hit , it's now officially time to reconsider. Mary-Kate and Ashley Olsen  (in one of their most twin moments in decades) wore matching pairs when touching down in New York City, finishing off casual outfits of dark straight-leg jeans and layered scarves and cardigans.
Still not entirely convinced about the flats? Avoid pricey designer pairs, experiment with high street finds that fall under the $150 mark, and then re-create this perfect outfit .
Source: Splash News Online 
Jeffrey Campbell black studded Jerez flat sandals  ($130)
Zara tan snakeskin cork double-strap flat sandals  ($100)
ASOS black leather velcro cork-bottom sandals  ($56)
Topshop Hola black cross-buckle flat sandals  ($40)
Topshop brown leather double-strap cork flat sandals  ($65)
Topshop white leather double-strap cork flat sandals  ($65)
Birkenstock Arizona white double-strap flat sandals  ($94)