Simply Sheets Fundraising is proud to offer you a long lasting and luxurious bed sheet set for your supporters. Microfiber is a high strength micro-polyester yarn used in the production of many products from the majority of our clothing, to upholstery, and of course, bed linens. The microfiber bed sheet had its beginnings in the Spa Industry and has become extraordinarily popular in today’s market. These bed sheets are long-lasting, easily washable, wrinkle resistant, stain-resistant, moisture wicking, breathable, affordable, and most importantly soft with a luxurious feel. Experience the comfort and luxury as a 1800 Thread Count.