Nike Men's Dri-Fit Knit Half-Zip Pullover Upper body: Dri-FIT 77% polyester/23% nylon. Lower body: Dri-FIT 75% polyester/25% nylon Dri-FIT Technology helps keep you dry and comfortable Double-knit fabric stretches as you move Asymmetrical half-zip for custom ventilation Modern fitcontours to your body Media-cord loop at upper back