The new and improved Warrior Wear? Thermostatic Base-Layer? Garments are designed to regulate body temperature, wick moisture, dry quickly, and control odor. The Engineered Fit? Series allows you to choose between a body-contoured Standard Fit and full Compression Fit simply by size selection. Select one size down from your normal size to achieve a Compression Fit, a true next-to-skin, no-movement fit which eliminates potential friction-related “hot spots” and helps reduce muscle fatigue.