A performance yarn composed of a nylon 6,6 embedded with coffee charcoal in combination with oxide absorbers, which are used to absorb body heat and retain it in the fabric. Conventionally, the body heat is lost to the ambient air; however, these fibers are able to increase the body temperature by capturing the body heat, retaining it, and giving it back. They provide dual effect of insulation and heating. Since this technology adds oxide minerals to the carbonized coffee bean shells, the material has better warming performance compared to other charcoal-based yarns on the market. The porous nature of coffee charcoal enables the material to capture of body heat and hold it tightly. This delays the release of energy, which keeps the body warm for longer. Since the charcoal and oxide additives are embedded within the fibers, the performance is not affected, even after repeated washing. The coffee charcoal also provides anti-bacterial properties and absorbs odor, neutralizing smell. Optimal performance is achieved when the functionalized fabric is next to the skin. There is a 10 ˚C (18 ˚F) increase in response to radiation from a 500W halogen lamp over 10 minutes. The nylon yarn can be easily dyed to achieve coloration and is available in sizes of 44/34/1, 44/34/2, 78/68/1, 78/68/2 (Dtex). Additionally, coffee charcoal production provides better yields compared to bamboo and coconut charcoal. For every 1 kg of coffee charcoal, 6.7 kg of CO2 is required while 10 kg of CO2 and 12.5 kg of CO2 are required for bamboo and coconut charcoal respectively. Applications include outdoor and sports apparel.