A delicate gown crafted from strips of silk and lace hangs on a rack filled with similarly refined pieces. From wide-legged, snowy white trousers featuring hand-beaded embellishments, to a collarless cocoon coat made of plush jacquard fabric in contrasting tones of blue and bronze, the H&M Conscious Exclusive collection isn’t what one would expect to find from a “fast-fashion retailer” let alone a collection labelled as “sustainable.” “It has to be beautiful fashion because when…