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When selecting a duvet inner, consider factors such as thread count in the outer fabric and box construction. A higher thread count signifies a denser, more durable fabric that can better contain the filling, preventing it from leaking out and maintaining even distribution. Box construction refers to the sewing technique that divides the duvet into smaller compartments, keeping the filling from shifting and ensuring that the warmth is distributed evenly across the bed.

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Lyocell is similar to viscose in that it is a regenerated cellulose fabric, but is made with a more eco-friendly process. TheU.S. Federal Trade Commissiondefines lyocell as rayons “composed of cellulose precipitated from an organic solution in which no substitution of the hydroxyl groups takes place and no chemical intermediates are formed” — essentially meaning it does not use the harmful chemical solvents normal viscoses use. Lyocell production also results in little waste product, but it is still relatively energy intensive.

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