A few special fabrics of predominantly cotton content made with different core yarns are discussed. Based on the ASTM and other standard test methods for cotton textiles, some of these fabrics containing only 10 to 30% (by weight) core material exhibit remarkable improvements in certain function-specific properties. For example, a 17% glass core content provides an excellent fire barrier character to the fabric, and only 10% content of high-performance polyethylene significantly improves the fabric tear resistance and, hence, durability. On the other hand, a 40% polyester-core content in a fabric provides satisfactory levels of dimensional stability and easy-care properties after the fabric has been appropriately heat set. A 50% polyester content may provide extra strength to an almost 100%-cotton-surface fabric/substrate for certain heavy-duty, industrial abrasive drills. These fabrics have been developed for marketing to explore possible commercial applications of the USDA-patented^* core-spinning technologies.