Pinzon’s flannel sheets are soft and cozy for a comfortable rest, day or night. Made in Portugal from 100 percent cotton, with a flannel weight of 160 grams per square meter, the fabric is lightly brushed for a soft, supple feel and is pre-washed for durability. The Twin Extra-Long set fits XL mattresses found in most college dorm rooms. It includes a 72-by-102-inch flat sheet, 39-by-80-inch fitted sheet with 15-inch corner depth, and one 20-by-31-inch pillowcase. Easy to care for, the set is machine washable and dryable. This high-quality fabric begins with dyed yarns, so the plaid patterning is woven through and appears on both sides. Offered in an array of colors, the set coordinates with Pinzon 160-Gram Yarn-Dyed Plaid Flannel duvets and shams, as well as Pinzon 160-Gram Solid Flannels. Fabric Definition Flannel: Flannel fabrics are noted for their fuzzy softness, warmth, and durability, and they can be dyed or printed. Thought to have been popularized in Wales in the 17th century, flannel was an all-wool fabric made of woolen or worsted yarns, with a brushed surface and a soft napped finish obscuring its weave. Flannel may be plain woven or twill woven and, today, most flannel fabrics are made of cotton fibers or synthetic rayon fibers that are slightly napped on both sides to resemble the old woolen or worsted yarn weaves. A wide range of flannel weights and textures is available. The fabric weight and quality of the napping affect the warmth and softness of the fabric. Many people prefer flannel bedding during the cold, winter months, but some flannel weights are appropriate in breathability and comfort all year long. An Amazon Brand.