Women's Silk Long Robe in Panthre de Nuit Petite Plume Petite Plume Silk Nightgown Nordstrom Petite Plume Silk Pajamas & Robes for Women Bloomingdale's Petite Plume Silk Nightgown Nordstrom. Head to sleep in simple sophistication. This versatile, serene blue Robe is fabricated in 100% Mulberry Silk, offering a cozy feel that gets softer over time. This 22mm mulberry silk has the longest, strongest fibers of any silk. That means smoothness, durability, and a beautiful sheen. The machine washable silk is inherently breathable, temperature regulating, and hypoallergenic. In our exquisite sleepwear, you will be tucked in love and off to dreamland.