The two main parameters to look out for in the down product selection process are Fill Power and Fill Weight. They are two separate and distinctively different aspects of the product: 

• Fill weight is the quantity of down (we measure in ounces) inside the shell of the duvet or pillow.  For easy reference, we categorize the fill weight into Summer, All-season and Winter for duvets to reflect the warmth they provide and Soft, Medium and Firm for pillows to reflect the support they provide. 
• Fill power is a measure of quality and fluffiness. The higher the fill power, the higher the quality. More details on fill power in the section below. 

At Linens Delight, we expressly identify fill power and weight for each product for each reference and comparison. 

Besides the information associated down quality and quantity, there are other important details to pay attention to, such as the duvet/pillow fabric material (refer to our Fabric section), baffle box design for duvet (to minimize the shifting of down) and other accessories such as corner ties. 

For more details, please refer to our “How to Choose Down Products” page in the Resource section. For additional information about down quality, refer to our “Down vs. Feather” page. 

What is fill power/ loft?

Fill power is a measurement of the amount of space (in cubic inches) that 1 ounce of down will occupy. The measurement is commonly referred to as “loft” and it is a scientific reflection of down quality and fluffiness. Typically ranged between 500 loft and 1,000 loft, the higher the number, the better the down and the more warmth it will provide.  

High fill power is attributed to larger down clusters. As discussed in the “Down vs Feather” section, since goose down clusters are generally larger and loftier, high fill power down (usually >750 loft) tends to be goose down. The down products we offer range from 600 loft to 800 loft and the goose down products range from 600 loft to 950 loft. 

The image below show the fluffy quality of our down at various fill power grades. The down in each cylinder weights equally at 1 ounce, the volume of the high loft down demonstrates the superior compressibility and insulating property.  

Is the higher fill power the better? 

High loft reflects the down’s high quality and high warmth-to-weight ratio. However, that does not mean it is always the best choice for everyone. We will make recommendations based on customers’ specific needs.