Throw on the premium beast layer and dial up the comfort and warmth, even on the coldest morning runs. A blend of no-itch, extra-soft, odor-resistant Merino wool, super-tough nylon and flexible elastane, it fits your body like a second skin. Perfect under the Max Effort long sleeve or Max Effort Zip-Up, this shirt is like a pre-warm up to your warm up.
- Flatlock seams
- 5.11 logo embossed back neck tape
- Shoulder panels help off-set layered seams when worn as a baselayer
- 5.11 logo heat transfers at upper shoulder and center back
YOU ARE SHOPPING ON OUR





