This pillowcase made with 19 momme quality silk travel size 21x16, zipper style. It is more durable that 16 momme and will withstand more times being washed.   
 The price is for one Pillowcase- For Facial and Hair Care. 
We spend a third of our lives sleeping with our hair on the pillow. There is a secret that good hairdressers and movie stars have known for decades: Silk pillowcases!  Cotton and rougher fabrics draws moisture from your hair. The fabric also twists the hair at the root causing damage to the hair follicles. The end results are dry hair, split ends, and less healthy hair. Silk is gentle and will not draw moisture from the hair. This leaves the hair shiny and healthy.

With so many sellers, different price points  and types of silk on the market the consumer may wonder:
How to tell if the silk is genuine or artificial? Why this silk looks so different than the other? 
There are several test that can be performed to determine that. But perhaps the best and most definitive test is Burn Test. You can take a few threads from the material and burn it with a flame. Genuine silk burns with smell of burnt hair. When you burn the edge of real silk fabric, the flame is invisible and it will stop burning as soon as the flame is removed. The ash produced hence, is black, crispy and brittle. It turns to powder when twisted in fingers.With the artificial silk, it is quite the opposite. When synthetic silk is burnt, there is a flame and smell of plastic. No ash is produced.