Good for much more than just seduction, silk sheets are hypoallergenic; naturally regulate body temperature, and keep mold, mildew, and dust mites at bay. Kumi Kookoon makes classic sets in a wide variety of colors, but it’s the company’s techniques and fabrics that distinguish its products. Standouts include duvet and pillow covers with embroidered butterflies and appliquéd leaves, as well as cashmere options that pair the softest of wools with silk charmeuse.