The XKG Elevation ¼ Zip is the lightest long-sleeve synthetic shirt in the XKG Series. It's constructed with 2-way stretch textured poly mesh fabric and treated with odor controlling Polygiene technology, which neutralizes odor by stopping the growth of odor-causing bacteria. Ultra-breathable fabric, and a ¼ zip for venting, you will remain cool while staying concealed, so it will keep you moving even in the hottest conditions. With flatlock stitched seams and mesh paneling, it is comfortable as a base layer or as an outer layer and will be a workhorse during the early months of the hunting season. Two-Way Stretch Fabric Polygiene Odor Control Technology Highly Breathable Textured Poly Material Extended Back Length Flatlock Stitched Seams Sleeve Thumbholes Shirt weight: 8.3 oz.