Our most technical tee, now with a Half Zip neck, the Level is engineered to provide top performance through the toughest conditions (and it makes great travel wear, according to Men’s Journal). The secret is 37.5^® Technology, which uses active particles to vent heat in warm conditions and retain it when it’s cold. This tech is proven to increase your body’s efficiency by up to 26% at lactate threshold, so you can push yourself further than you’ve ever gone before.

Product Details

• Athletic fit
• Zippered neck with reflective tape
• Super-soft fabric
• Powered by 37.5^® technology, which helps warm you up when you’re cold and cool you down when you’re hot
•  34% 37.5^® post-consumer recycled Polyester, 52% post-consumer recycled Polyester, 7% Wool, 7% Spandex
• Anti-microbial
• Reflective tape on hem for high visibility
• Reflective "4" logo on back 

Model is 6'1" and is wearing size Medium