The Heat-Grid™ Flannel combines classic flannel styling with technical insulation inspired by 686 snow outerwear and midlayers. Grid-fleece lining through the body traps heat while maintaining airflow and breathability during movement, helping regulate comfort through changing temperatures and conditions. Smooth taffeta-lined sleeves make layering easy under jackets or over base layers without friction or bulk, while five total pockets—including brushed tricot-lined handwarmer pockets—add everyday utility. Designed for commuting, outdoor activity, travel, and everyday cold-weather wear, it delivers warmth and mobility without the heaviness of traditional insulated flannels.