Wools are one of the most popular materials used in clothing, especially during the winter season. However, there are multiple synonyms used for the word "wools" depending upon the type of wool fabric or woolen yarn. Some of the common synonyms for "wools" are fleece, flannel, tweed, houndstooth, cashmere, merino, and mohair. Fleece is a soft and lightweight fabric, often used to make jackets or pullovers. Flannel is a warm and soft fabric, popular for making shirts and pajamas. Tweed is a coarse woolen fabric, typically used for suits and jackets. Houndstooth is a distinctive pattern in woolen fabrics. Cashmere and Merino are very soft and fine woolen yarns used for knitting. Mohair yarn is derived from the hair of Angora goats, and it is a popular choice for making warm winter wear.