SITKA GEAR WOMEN'S HUNTING WINDSTOPPER JETSTREAM VEST. The dual-purpose Sitka Jetstream Vest for women is meant for wear as an insulation layer or as core-warming outerwear. GORE-TEX INFINIUM with WINDSTOPPER Technology provides an absolute shield against bone-chilling winds, working hard to keep your core warm on the hunt from early fall to late winter. SITKA WOMEN'S GEAR. Every aspect of every product in the SITKA Women's line is built for the female hunter. With an obsessive attention to detail, we dedicated thousands of hours of research, design and rigorous testing toward one simple goal: to provide women with unequaled technical hunting gear that enhances the experience. State-of-the-art technologies combine with flawless fits to provide maximum comfort, effortless movement, lightweight durability, breathability, and ultimate protection from the elements.