Wear it for your warm-up or just to warm up, the 5.11 RECONHalf-Zip provides superior warmth and comfort in a sturdy, lightweight package. Crafted from 6.3-oz. 94% polyester / 6% spandex fleece knit, the 5.11 RECON Half-Zip offers a snug and secure fit without bunching or rolling. A full underarm gusset ensures complete freedom of movement, and flat lock stitching throughout increases comfort while reducing chafing and pinching. A textured inner fabric face maximizes heat retention, and the YKK lock down zipper extends to the sternum, allowing you to easily adjust your core temperature. A zippered chest pocket provides accessible storage when worn as a base or middle layer.