More like a premium beast layer, this fitted shirt is built for ultimate comfort and warmth. We combined no-itch, extra-soft, odor-resistant Merino wool with super-tough nylon and flexible elastane to create a fit that feels soft yet strong. Perfect under the Max Effort long sleeve or Max Effort Zip-Up, this shirt is sure to inspire your workouts. (XS) Flatlock seams 5.11 logo embossed back neck tape 5.11 logo heat transfers at upper shoulder and center back Shoulder panels help offset layered seams when worn as a baselayer