Woven with 100% Linen. Reverses to 52% Linen and 48% Cotton. Features a zipper closure. STANDARD 100 by OEKO-TEX® Certified: WSI Certificate #: 14.HUS.42449: tested for 350+ harmful substances to keep you and your family safe from chemicals common to textile manufacturing. Accommodates a 26" x 16" insert. Sold individually. Imported. Machine was in warm water on gentle. Only non-chlorine bleach when needed. Tumble dry on low. Warm iron as needed. Overall: 26" w x 16" h x 5" t Zipper: 25" l