For a light weight extra layer of plush warmth, the 100 wt. micro fleece Marmot Men's Reactor Vest is unbeatable. Secure your valuables in the zip hand pockets or zip chest pocket. The windflap behind the zipper prevents drafts from blowing through. Polartec Classic 100 weight 100% polyeter micro fleece construction, 4.6 oz. yd. Flat lock construction. Zippered handwarmer pockets. Bonded zippered chest pocket. Wind flap behind front zipper. Chin guard. Elastic drawcord hem. Regular fit. Avg. wt. 9.4 oz. 266.5 g. Center back length: 27.75.