Magnolia Organics Barrier Cloth Pillowcase - Standard, Natural HYPOALLERGENIC & ORGANIC: High-tech, ultra densely woven fabric to protect against dust mites, bed bugs, cat dander, and more! 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. PROTECT YOUR PILLOW: Dust and other allergens love to collect in pillows, creating unhealthy air quality while you sleep. With a 3.05 micron pore diameter, our pillow cover will block bed bugs, dust and most allergens. PERFECT FIT: Standard pillowcase measures 20" x 30" MACHINE WASHABLE: Our products arrive in your home free from sizing and other harmful chemicals found in most bedding. Wash in warm water separately, and tumble dry on low.