The composition of 90% duck down and 10% duck feathers makes this duvet not lightweight. Well-filled and therefore pleasantly warm for a restful night's sleep without excessive sweating due to high body temperature. Duck down is also cheaper than goose down, making it more budget-friendly. However, it does differ in quality. Duck down has a significantly lower insulation capacity, and the flakes and feathers are less resilient and durable. Therefore, topping up your duvet becomes necessary over time.