【Ultra-Soft & Silent 420-Thread-Count Shell】 – Made from 100% skin-friendly fabric, this goose down comforter king size is ultra soft and completely noiseless, ensuring undisturbed sleep for you and your partner. 【Advanced Moisture-Wicking Technology】 – Filled with Texcote-Nano treated white goose down, this breathable duvet insert repels moisture, stays odor-free,and 3X more breathable than regular down 【800+ Fill Power for Supreme Fluffiness】 – Experience hotel-quality loft with ultra-clean, high fill power goose down that’s evenly distributed in a 3D box-stitch design to prevent clumping. Stays fluffy and lightweight year after year. 【Durable, Luxury Construction】 – Reinforced with 8 corner loops, elegant piping, and premium stitching, this all-season duvet insert maintains its shape and long-lasting warmth—no shifting or cold spots. 【Ethically Sourced & Certified Safe】=After making down duvets for 35 years. Our down comforters are made to the highest standards and certified by Responsible Down Standard (RDS) and OEKO-Tex Standard 100 .This means that our comforters are clean, cruelty-free.