Kenyon Consumer Products manufactures base layer thermal underwear with Outlast fabric. In these garments, Outlast helps keeps officers more comfortable over a longer period of time. Products with Outlast interact with the microclimate next to your body and the external environment to buffer swings in temperature.Unlike fabric and insulation that trap heat, Outlast products absorb, store and release heat as needed. By buffering changes in temperature and humidity, Outlast Thermocules reduce overheating, sweating and chill. Kenyon products with this technology include a men's and women's crew neck long sleeve top, and men's and women's bottom.