This Core 365 quarter - zip is perfect for men who love running or engaging in outdoor activities during colder weather. You can wear it while jogging in the park or hiking in the mountains. It's made of 100% polyester melange jersey. It has a center front translucent zipper with a semi - auto lock slider and rubber pull tab, and there's contrast coverstitching throughout. The reflective piping at the front shoulders adds a nice touch.