The Kaon Jacket is an incredibly light hybrid down/synthetic jacket from Rab. Weighing in at a tiny 250g it's perfect for alpine climbers, mountain marathon runners, long distance hikers, or anyone who needs a warm jacket without the weight. 70g of 800 Fill power European goose down (Responsible Down Standard certified) is used in the body, with Stratus synthetic insulation on the shoulders, hips, cuffs and side of hood (areas prone to compression or exposure to moisture). The shell is a wafer-thin 10d Atmos fabric, with un-insulated Pertex Quantum Air panels under the arms for greater mobility and to allow sweat to escape. Kaon Down Jacket - Men's