Classic Pillow Case Sorry, no returns or exchanges available on accessories, extra Pillow Cases or our Silk offerings. *Please be sure that you already own a Classic Pillow to fit this product. If you are unsure which style you have, please email Hazel at dreamconcierge@sleepcrown.com to confirm which style pillow you have. Custom-made Pillow Cases that match the curve of the Sleep Crown Classic. These Pillow Cases highlight the Crown’s smart design and allow plenty of space to breathe easily. Every Sleep Crown Pillow comes with 1 Sleep Crown Pillow Case... If you desire an extra case for your Sleep Crown Classic for ease of laundering, you may choose to order an additional Pillow Case. Choose the extra Pillow Case of your dreams... organic Bamboo Jersey (solid or striped) or 100% grade 6A, 22momme pure Mulberry Silk.