Polyester [Package includes] Our spring summer floral decorative pillow covers measure 16x16 inches. Package contains 4 pieces of throw pillow cases only, INSERTS ARE NOT INCLUDED. [Durable material] Our flower pillow cover is made of machine-washable fabric, moderate thickness, and durable. [Excellent design] Our spring throw pillow covers uses an extended invisible zipper. [Easy cleaning] Our spring summer pillow covers are made with an advanced printing process and can be machine-washed in cold water. [Applicable occasions] Our floral pillow covers are very useful home decor and can be placed on your bed in the bedroom, on your sofa in the living room, or on outdoor decorations for your home. Spring Summer Pillow Covers Set of 4