Hair Kinetics3 Luxurious, Comfortable, Friction Reducing, Moisture Retaining Iridescent Dupioni Silk Bonnet - Promotes healthy hair protection with the exterior Dupioni Silk of the highest quality and lined interior of 100% Charmeuse Silk, woven with Mulberry, 19 momme, lightweight, better than Satin or Satin Silk. The interior Silk reduces friction vulnerability and at 19 inches in diameter expands to accommodate various hairstyles and comfortably remain on the head.