Like a sweat shirt only different, the Men's Fast Trek II Half Zip Fleece Jacket from Columbia Sportswear offers exceptional versatility and comfort with the great performance properties of 100% polyester microfleece. A perfect insulating layer that can easily go it alone, this fleece pullover maintains its warming qualities when wet, blocks a pesky breeze, and gives you plenty of room to move when you've gotta make tracks. Put it on over a technical tee or underneath your favorite shell. The Fast Trek II Half Zip will have you leaving few bread crumbs, whether you're jogging over to the park for a pick-up game, or forging off into the wilderness for a weekend getaway. Ready-set explore.