The Kensington Lifaloft Vest Is A Great All Year Round Piece In Any Conditions, Keeping You Warm Even When Wet. Lifaloft Is An Insulation Revolution That Will Keep You Warmer With Less Weight & Bulk Due To The Unique Lifa Yarn Technology. Developed In Cooperation With Primaloft, Lifaloft Is A Combination Of Lifa & Primaloft's Extensive Knowledge In Synthetic Insulation. Less Carbon & Water Footprint Vs Comparable Polyester For A Lower Environmental Impact. Minimum Quantities Apply.