What is the Patchwork Pillow Cover made of, and what material is on the reverse side?

The Patchwork Pillow Cover is made of 44% viscose, 25% linen, 20% cotton, and 11% lyocell, and this pillow cover reverses to 100% cotton. The reverse side is solid Natural.

Will the Patchwork Pillow Cover fit a 20" insert, and is the insert included?

Yes, this pillow cover accommodates a 20" insert, and the insert is sold separately. Its overall dimensions are 20" w x 20" d. It has a zipper closure.