Lightweight, breathable and thermal, the Active Mid Weight Grid Fleece combines the heat retention of fleece with the lightness and breathability created by the unusual construction of the fabric. The characteristic “grid” weave is extremely pleasant to the touch and increases both breathability and even distribution of heat. It is the essential mediumweight mid layer under a waxed jacket, when the climate makes this necessary, but also perfect in any sport, from skiing to hiking, to control heat and humidity during physical activity .