Core warmth is key when opposing weather changes your hunting situation. The Fahrenheit Vest is a windproof mid-layer that features lightweight Primaloft(R) Silver Down Blend insulation with a WINDSTOPPER(R) by GORE-TEX LABS membrane. The cut is slim enough to wear under heavier layers, but the woven polyester rip stop face fabric is tough enough to stand alone. No-Cold-Spot quilting keeps heat evenly distributed and down insulation in place. Fahrenheit Vest Optifade Waterfowl Marsh XXL