For Autumn/Winter 2011, Arc'teryx Alpha and Beta FL (Fast and Light) jackets feature innovative new Gore-tex Active Shell technology. To manage perspiration more effectively during aerobic pursuits, Active Shell integrates a lighter, thinner, more breathable Gore-tex membrane with a moisture-wicking tricot backer textile. The 100% DWR treated Gore-tex Active Shell with Nylon face fabric provides durably waterproof and windproof protection while on the move. The lightweight fabric has a soft hand and moves quietly. Reinforced with Gore-tex Pro Shell (with tricot backer), those jackets are robust and pack away easily.