This extremely protective jacket was developed with insight from Search & Rescue teams who spend long hours on cold mountainsides. It's extremely protective with a superior warmth to weight ratio for packability. We used groundbreaking insulation technology -- LIFALOFT sheet insulation in combination with PrimaLoft GOLD fiber balls and a conductive graphene lining -- to achieve superior warmth. The warmth is distributed strategically via optimized body mapping. As always, we added the weatherproofing you need to stay dry as well as warm. The jacket uses our innovative LIFA INFINITY hydrophobic fabric, the next level of responsible waterproof/breathable technology. Its weatherproofing properties were achieved without the use of chemicals and endure without retreatment. The jacket also has a PFC-free DWR treatment to shed light precipitation in changeable weather. With the environment in mind, this jacket was responsibly made with the certified bluesign textile manufacturing process, which reduces waste in every step of the clothing supply chain.