Eiderdown is considered by many to be the pinnacle of down fillings, and there are several reasons why it's held in such high regard: Superior Insulation: Eiderdown has an incredibly high fill power, which measures the volume that a given amount of down will occupy. High fill power equates to better insulation with less weight. This means an eiderdown duvet can provide exceptional warmth without being heavy. Rare and Natural: Eiderdown is collected from the nests of the wild Eider duck, primarily in Iceland and Canada. The ducks naturally shed the down, which is then gathered by hand, ensuring no harm to the birds. This harvesting method makes it a sustainable and ethically sound choice but also contributes to its rarity and high cost. Softness: Eiderdown clusters are incredibly soft. They adapt seamlessly to the body, offering a luxurious and comfortable sleeping experience. Breathability: Eiderdown has excellent moisture-wicking properties, which means it can help regulate body temperature by drawing away moisture. This results in a duvet that keeps you warm without causing overheating. Durability: Eiderdown is resilient and can last decades if properly cared for. The durability, combined with its performance, makes it a long-term investment. Elasticity: Eiderdown has a natural elasticity allows it to regain volume even after being compressed. This means that with some fluffing, your duvet can feel as lofty as when it was new. Natural & Hypoallergenic: Given its natural origins and processing methods, eiderdown tends to be less likely to provoke allergies compared to some synthetic materials. Environmental Impact: Harvesting eiderdown doesn't harm the birds, and there's a symbiotic relationship between the Eider ducks and the collectors. In many places, the birds are protected, and their habitats are maintained by the collectors, ensuring the continuation of this natural cycle.