What is down fill power and fill weight for duvets?


Down fill power measures the quality and effectiveness of the loft or fluffiness of the down in a duvet. A higher fill power means the down duvet will be lighter and provide better insulation. Fill weight is the actual weight of the duvet filling. 

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Down fill power and fill weight key facts: 

  1. What is down fill power in a duvet?
  2. What is down fill weight in a duvet? 
  3. What is a scooms duvet's fill power?
  4. What is a scooms duvet's fill weight?
  5. scooms down cluster
  6. Fill power facts & myths

    1. What is down fill power in a duvet?
    Down fill power is a way of measuring the quality and effectiveness of down in a duvet. The fluffier the down is, the greater the number of air chambers and therefore, the more effective the duvet is at insulating. So, a higher fill power means the down duvet will be both lighter and more insulating. The down duvet will also recover its fullness more easily when shaken in the morning and is proven to be more durable, so it will last longer.

      

    2. What is down fill weight in a duvet?
    Don't confuse fill weight with fill power! Fill weight is the actual weight of the duvet filling. The higher the fill weight, the heavier the duvet. However, a heavy duvet does not equal a warmer duvet.

    Fill weight determines how soft or firm a duvet is but, fill power measures the effectiveness and quality of the down or feather duvet filling. So, a duvet with high fill weight and low fill power will be heavy but provide poor insulation. 

    (If you see weight referenced with ‘gsm’ this means the weight of the filling within a square metre.)

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    3. What is a scooms duvet's fill power?
    scooms Hungarian goose down duvets have high 700 fill power. Technically called 700 CUIN fill power. This is the highest fill power you can get for down that is a by-product of the food industry.

     

    4. What is a scooms duvet's fill weight?
    These are the fill weights for the different tog rated scooms duvets:

    * Single: 9 tog - 486g, 4.5 tog - 302g, All season - 788g 
    * Double: 9 tog - 720g, 4.5 tog - 448g, All season - 1168g 
    * King: 9 tog - 911g,  4.5 tog - 567g, All season - 1478g
    * Super King: 9 tog - 1030g, 4.5 tog - 641g, All season - 1671g

    If you're not sure what a tog rating is, then find out more in our Tog rating guide.

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    5. scooms down cluster
    This is a close up view of a scooms Hungarian down cluster. The extra fine filaments trap more air giving our duvets a high fill power. This leads to a warmer and more breathable 'cloud like' duvet.

    Goose down cluster | scooms duvets

     

    6. Fill power facts & myths

    True fill power facts:

    • The higher the fill power, the larger the clusters of down.
    • The larger the cluster of down, the higher the quality.
    • The higher the quality, the more durable the loft and fluffiness.
    • The larger the cluster of down, the more air it traps.
    • The larger the cluster of down, the higher the loft.
    • The larger the cluster of down, the better the insulating properties.
    • The larger the cluster of down, the lighter weight the duvet.

    Untrue fill power myths:

    • The higher the fill power, the firmer the duvet.
    • The higher the fill power, the heavier the duvet.
    • The higher the fill power, the higher the fill weight.

     

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    Top fill power faqs:

    What does fill power mean in down duvets?

    Down fill power is a way of measuring the quality and effectiveness of the down in a duvet. The fluffier the down is, the greater the number of air chambers and therefore, the more effective the duvet is at insulating. 

    What does 700 fill power in a down duvet mean?

    Fill power is calculated by measuring how many cubic inches of space an ounce of down takes up when the down clusters are fully expanded. 700 fill power means that one ounce of down fills 700 cubic inches of space.

    What is the highest fill power?

    700 CUIN fill power is the highest fill power for down that is a by-product of the food industry.

     

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