Model Number: 683485-The Nike Men's Dri-Fit Element Half-Zip provides you with a super soft layer for when you need a little extra warmth on your run. You won't easily overheat, though, thanks to the half-length zipper, which offers you easy ventilation. The flatlock seams prevent you from chafing, while the soft heathered fabric feels nice next to your skin. Built with Dri-Fit, the fabric wicks moisture away from your skin to keep you dry and comfortable. Thumbholes offer optional sleeve security and additional coverage, while reflective design elements keep you visible in low-light conditions.