550 THREAD COUNT: Our highest thread count organic fabric, made from silky sateen with ring-spun and long staple organic fibers.GOTS CERTIFIED ORGANIC COTTON: The highest level organic certification from the cotton seeds right through to our Connecticut facility. Organic Cotton grown without the use of pesticides & herbicides, Azo-free dyes with no heavy metals, fair labor spinning, milling, sewing, and packaging.THE GOLDILOCKS SET : This unique fabric has a substantial feel that is velvety smooth, but is able to regulate your temperature for a great night??s sleep – not too cool, not too warm. Just right!PERFECT FIT: Standard pillowcase measures 20 x 30MACHINE WASHABLE: Our products arrive in your home free from sizing and other harmful chemicals found in most bedding. They may feel stiff on the first use, but after 3-4 washes they will be broken-in with your own unique comfort profile. Wash in warm water separately, and tumble dry on low.