When temperatures drop and you need an under plate carrier option, the Rainier Winter Combat shirt is the ideal choice. In a combat style design, the Rainier combines two revolutionary Massif® flame resistant softshell fabrics. SABA™, a lightweight no membrane fabric, is durable, comfortable and highly breathable making it the perfect choice for under armor. Massif Battleshield™ fabric featuring Gore® FR stretch technology is used in the sleeves. Battleshield is lightweight, breathable, water-resistant, and windproof providing excellent protection from the elements outside the plate carrier. These softshell fabrics provide exceptional flame protection, outstanding durability, breathability, and warmth to weight ratio. With a streamlined fit that eliminates bunching or riding up under armor, the RWCS gives you optimum performance for cold weather activities.