Crafted with over 680 high-quality duck down for 90% optimal warmth, our product features revolutionary down locking technique using fine nylon yarn and a smooth calendering finish, ensuring flawless down distribution and eliminating leakage for long-lasting warmth. LIGHTWEIGHT SOFT TOUCH FABRIC: Ultra-fine yarns, light and dense for ultimate comfort and warmth. HIGH QUALITY 680+ DUCK DOWN: 90% filling for optimal warmth, evenly distributed for consistent warmth. REVOLUTIONARY DOWN LOCKING TECHNIQUE: Crafted with fine nylon yarn, with smooth calendering finish. FLAWLESS DOWN DISTRIBUTION: German technology eliminates down leakage for long-lasting warmth.