GOLDWIN's Light Warmer Kochi Vest is a lightweight, breathable insulated vest engineered for trail running and high-output activities. It pairs a Pertex Quantum Air Diamond Fuse shell with stretch breathable insulation to deliver warmth with minimal bulk. Key attributes: Black | Pertex Quantum Air Diamond Fuse nylon | Lightweight and breathable | High snag and pilling resistance | Breathable, stretch insulation (3DeFX+) | Engineered for sweat management during high-output activity | Side pockets | Includes stuff sack for compact storage | Targeted uninsulated zones for improved breathability | High neck | Sleeveless | Streamlined silhouette | Clean, minimal lines | Laser-cut ventilation at center back | Composition & care: Face fabric: 100% Nylon (Pertex Quantum Air / Diamond Fuse) | Lining fabric: 100% Nylon (Pertex Quantum Air; coating/resin-finished) | Lining knit (Octa): 100% Polyester | Filling: 100% Polyester (3DeFX+)