If you buy one separate for Spring, make it a sheer blouse or ruched top. Layered sheer fabrics were one of London Fashion Week's biggest trends, and the easiest way to wear it is as a top, layered up over a bandeau, vest, or t-shirt. Opt for House of Holland's neon style for a trend double-whammy, or choose a sexier gathered look like the long-sleeved styles on offer at Molly Goddard and Mark Fast.