Dr Kate Strasdin on Twitter: "A swathe of tulle radiates out in the couture version of a #ballerina’s tutu, the structured and embellished satin bodice holding the shape whilst the cloud of sheer skirt falls from the hips. #Balenciaga 1950 @museumatFIT #fashionhistory… https://t.co/RFIpWu2W0S"