DLP Tactical Dry-Tech Polyester Compression Fit Camo T-Shirt (ACU, 4XL) Quick Drying, 90% Polyester / 10 % Spandex Dry-Tech Moisture Wicking High Performance Fabric keeps you cool and comfortable even when the action is hot and fierce Compression Fit hugs your body tight, reducing muscle fatigue and virtually eliminating chaffing when worn as a base layer. (For those wanting a more casual fit, please order two sizes up from your typical size). Perfect as a light weight, high performance base layer under a tactical vest; as a high performance shirt for physical training and exercise; or for fashionable casual wear. Minimal seams reduce irritation for maximum comfort