Designed for late season hunting, when temperatures are plummeting, the Ridge Reaper ColdGear Infrared Insulator Jacket from Under Armour will keep your warm, comfortable and focused on the hunt. Insulated with 400 grams of PrimaLoft insulation, the Ridge Reaper Insulator provides ultimate warmth, without a lot of bulk or weight. ColdGear Infrared technology is a result of Under Armour using infrared imaging to research and pinpoint heat loss in insulation systems, in an effort to make their gear warmer. Stealth Bombers stay undetected by utilizing a high-tech ceramic coating that absorbs electromagnetic waves, keeping heat in, rather than dispersing it into the atmosphere. Mimicking this technology, Under Armour was able to create a flexible ceramic coating on the inside of the garment that holds heat better rather than dispersing it, keeping you in the field longer and increasing your chances at a big buck. This jacket is also wind resistant and has the STORM DWR water repellent finish applied, to help keep you dry in damp conditions.