Model Kirat Bhinder poses in a fleece bed jacket with satin trim worn with over-the-knee pants designed by Lou Lou de la Falaise for Yves Saint Laurent's couture lingerie collection.

Our stay-at-home affairs have blurred the lines between nightwear and daywear and may be shifting the scope of what’s stylish to sleep in. Now, as in years past, a cross-pollination of fabrications in sleepwear and sportswear has made each category less distinct. From the Fairchild Archive, WWD takes a look back at sleepwear trends from couture to mass.