This is grade 6A, 22 momme, 100% mulberry silk. The same silk used by a very popular pillowcase brand! Silk is recommended for pillowcases as it works
Mulberry Silk
6A Grade Undyed Mulberry Silk Fabric, 16/19/22/25 Momme Silk
Wholesale Luxury 22 Momme 114cm Width Mulberry Satin Silk Fabric Suppliers -Sino
Silk Fabric, Solid Color, 22-23 Momme Heavy Silk Crepe Fabric
Big Green Umbrella Media, Inc.
Fashion - Silk - Silk Crepe De Chine - fabric fabric
Collections – Mill Creations
Luxurious Silk Crepe
Fashion - Silk - Silk Crepe De Chine - fabric fabric
Trade-marks Journal Vol. 66 No. 3370