Pillowcases have many different kinds of closures, like buttons, ties, or envelopes. They may also have none at all. Depending on the purveyor, pillowcases are either sold separately or in pairs.

 Ultimately, the choice of silk vs. flannel sheets and the specific qualities of king sheets comes down to personal preference and needs.  By considering factors like bed sheet material, thread count, and fit, you can make an informed decision and choose great quality sheets that will provide comfort and satisfaction for years to come.