Front is made of 60% cotton and 40% linen.Back is made of 52% linen and 48% cotton.Reverses to solid.STANDARD 100 by OEKO-TEX Certified: WSI Certificate #: 14.HUS.42449 HOHENSTEIN HTTI: tested for 400+ harmful substances to keep you and your family safe from chemicals common to textile manufacturing.Zipper closure.Accommodates a 22″ square insert.Imported.Turn inside out when machine wash in cold; gentle cycle.Use only non-chlorine bleach when needed.Tumble dry low.Warm iron if needed.Overall: 22″ sqZipper: 21″ l