I love these and have repurchased them 3 times over the course of about 5 years:

YANIBEST Pillow Cases 2 Pack 100% Mulberry Silk Pillowcase for Hair and Skin with Hidden Zipper (Standard, bluehaze) https://www.amazon.com/dp/B07KVXG2PQ/ref=cm_sw_r_cp_api_i_OecGEbR0WC3BB