The North Face Men's Flathead Insulated Triclimate® is an adaptable systems jacket for changing weather conditions. This three-in-one jacket features a waterproof, breathable, seam sealed HyVent® shell that’s insulated with ample Heatseeker™ insulation for bolstered warmth, and an interior (and removable) liner jacket made from a durable and cozy sweater-knit fleece. Each jacket can be worn alone or layered for maximum warmth and protection.