Tailored for mid to late season, the Core Kit brings a new level of versatility and technology for the heart of the whitetail season. With First Lite's standard KitLinkTM pass-thru magnetic pockets, you have seamless integration with the Core Jacket and Bib's muff pocket. The Core Vest is constructed with 80gsm of PrimaLoft(R) Gold insulation and windproof technology to keep you more comfortable and in the stand longer on the most blustery of days. The versatile Core System is optimized for performance through the core of many hunters' deer seasons; hunts from late October through November when the mornings are frosty and northern winds bring signs of winter. Windproof and Dead Silent. Fully-featured. Seamless integration. Worn on their own or combined to maximize the kit's true performance, the Core Kit offers never-before-seen versatility for the whitetail hunter. Parker is 5'9" 175 lbs wearing a size Medium. Check out the rest of the Whitetail Core Line.