Built to perform in cold winter climates, the KOA TDS® Infrared Gore-Tex jacket cranks up the warmth without the weight. Our revolutionary Thermal Defense System® puts heat at your core with strategically placed infrared thermal panels that use certified (RDS®) responsibly sourced natural downfill, warming fabrics and infrared to maintain body heat, eliminating the need for a 2nd layer. Combined with the unstoppable waterproof protection of a fully-taped GORE-TEX 3-layer shell with moisture-wicking C-KNIT™ backer and our patent-integrated Face Tech™ face mask and Zip Tech® jacket to pant interface for waist-deep defense that will go beyond boundaries with you. Simply put, the KOA is the most technical piece our women's range.