The Atom LT Vest is a proven performer across a range of seasons, landscapes and activities. Elevated with advanced insulation and material technologies, this versatile vest delivers its best, most versatile performance ever. Coreloft™ Compact synthetic insulation retains warmth if wet and withstands years of packing and unpacking, and the breathable, durable Tyono™ 20 shell resists wind and light weather. Stretch fleece side panels aid ventilation and freedom, and the entire vest packs into its own pocket. Weight 240g / 8.5 oz. Fit Trim fit, Hip Length, Centre back length: 74 cm / 29.1 in. Versatile synthetic insulated mid layers with a high degree of weather resistance. High performance, minimalist design that is durable for its weight. Versatile high performance designs for diverse activities and conditions. Man-made insulation with quick dry times, durability and retains warmth when damp. .