Simons Maison - Terry mattress protector Simons Maison Simons Maison exclusive A convenient and durable mattress protector made of organic cotton terry and polyester. The water-resistant coated underside protects your mattress from allergens and messes. Organic cotton and polyester blend terry Polyurethane lining effective up to 50 washes Dust mite protection barrier Easy machine care Super stretch edging that fits any mattress up to 16" thick