Down could pass IDFL test, and conform to your need.
This comforter offers maximum warmth and filled with 90% white duck down, which is soft and light.
You’ll feel like you’re sleeping under a warm and fluffy.With its hypoallergenic, super-cleaned down, this comforter offers superior softness and quality to last for years. Its cover uses 100% pure cotton ticking with 233 thread count for ultimate smoothness and softness.
Its boxstitch construction prevents down from shifting and allows for maximum loft.

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Pandawill