What makes this duvet insert different? Made in 3 weights of the finest materials to support your ideal sleep temperature: our down is ethically sourced from farms in the U.S. and triple-washed to guarantee a cleaner, longer-lasting loft. Wrapped in a soft, breathable, down-proof shell made from the highest quality 100% organic cotton threads, each insert has a unique baffle-box construction that keeps the fill perfectly in place to maintain fluff and shape over time. The Weight for Your Ideal Sleep Temperature: Warm Sleeper or Climate – Lightweight Comfortable Sleeper or Climate – Midweight Cool Sleeper or Climate – Ultra-weight Details: - Triple-washed, cruelty-free, IDS certified down fill - Unique bafflebox construction - 4 corner loops to secure to our duvet set interior ties - 3 different weights for your ideal sleep temperature - Down-proof cotton shell