Sitka Grindstone Work Vest - Built for those who want to protect their core while keeping their arms free for any task in the field or on the job, The Grindstone Work Vest is everything that the Grindstone Jacket is, minus the sleeves. 100% Nylon Cordura oxford fabric GORE WINDSTOPPER Technology makes the jacket 100% windproof 101g Primaloft Silver synthetic insulation Center front zipper with windbreak Zippered chest and hand pockets Drop tail hem Style: 600197