From Slip, the Sunshade Queen Zippered Silk Pillowcase with Scalloped Edge features: 1 x sunshade pure silk queen pillowcase with scalloped edge and invisible zipper closure (20" x 30" / 51cm x 76cm) Machine washable See care instructions for details Dermatologist recommended Anti-aging, anti-sleep crease, anti-bed head The beauty secret of celebrity hairstylists, dermatologists and beauty experts Over 95% of users agreed sleep creases, sleep lines and sleep wrinkles were fewer and less noticeable.† Clinically shown to visibly improve: The appearance of fine lines Skin hydration Skin texture and smoothness Skin radiance, luminosity or brightness User Results: Over 96% of users would recommend a slip® pure silk pillowcase to their family and friends† Over 92% of users prefer sleeping on a slip® pure silk pillowcase over their ordinary cotton or synthetic (non-silk) satin pillowcase† Over 90% of users will be adding a slip® pure silk pillowcase to their beauty regimen† 90% of users agreed that their hair was more manageable† 90% of users agreed that they had less frizz in their hair upon waking† Over 85% of users agreed that their bed head visibly improved upon waking† Over 84% of users agreed that their skin had fewer visible lines or wrinkles† Over 80% of users agreed that their skin looked more youthful† The Slipsilk™ difference: Slipsilk™ is 100% pure mulberry silk that is specially-commissioned and made to our exacting standards, developed and refined over ten years to provide the ultimate combination of shine, thickness, softness and durability We use the highest grade (6A) long fiber 100% pure mulberry silk, with a thickness of 22 momme and enforce the strictest quality guidelines, including non toxic dyes Imported.