Construction Cover is made of 100% cotton; filled with 100% polyester. 300-thread count sateen. This product has been tested by Allergy Standards Ltd and is officially certified asthma- and allergy-friendly (AAFA); scientifically proven to considerably reduce your exposure to allergens. To lengthen life of insert purchase Pillow Protector (sold separately). Standard Sham: 18" h x 24" w King Sham: 18" h x 34" w Care Spot clean with distilled water when necessary. Machine wash in warm water in a c