Apparel designed for use during athletic activities generally exhibit characteristics that enhance the performance or comfort of an athlete. In hot conditions, heat dissipation and sweat management during training pose a major problem. Athletes have to cope with heat from the external environment as well as heat generated from the body during training.

A recently published patent application from Nike, the premier innovator in the clothing and sporting industry, discloses apparel addressing the heat management concerns providing athletes improved comfort. The apparel includes a torso region and arm region. The apparel is formed from two materials. The first material includes a yarn that exhibits dimensional transformation upon exposure to sweat (or water) forming a plurality of nodes that e extend outward from the surface of the first material. These nodes form a separation between the first material and the wearer that promotes air ventilation and sweat evaporation. This helps moving heat away from the body during training.

This apparel facilitates releasing heat away from the body and thus reducing the risk of potential adverse health consequences such as heat exhaustion and heatstroke.