What Does Down Fill Power Tell You? Fill power is a number that indicates the relative quality of down. The number comes from a lab test that measures how many cubic inches of loft one ounce of that down fill produces. Higher fill power numbers indicate greater loft and insulating efficiency.

2025年2月9日 · Have you run across the term “down fill power” while shopping for sleeping bags, puffer jackets, or a duvet? These numbers range from 450 to 900, and sometimes above. Generally—but not...

Fill power is a measure of the loft or "fluffiness" of a down product that is loosely related to the insulating value of the down. The higher the fill power, the more air a certain weight of the down can trap, and thus the more insulating ability the down will have.

2023年2月15日 · Fill power is a number that measures the fluffiness and quality of a down product. Fill power measures the amount of space one ounce of down will occupy in cubic inches. Why is fill power important? Higher fill power means the down will have better quality, higher loft, and will retain its firmness longer.

In this guide, we’ll show you what down is and why we use it, what the crucial and often overlooked difference between fill power and fill weight is, how to make sense of warmth-to-weight ratio and down-to-feather ratios, and how to figure out how warm your jacket will be.

2021年11月7日 · In short, fill power describes down’s ability to fluff back up after being compressed – the more it can fluff up, the more air it’s able to trap which means more heat provided for your body.

2023年12月8日 · Down fill power is a measure of how many cubic inches 1oz of down takes up in a cylindrical tube. Fill power can be identified by the number that accompanies it. That number usually ranges from 350 to 900, and it indicates how much space the down occupies. This number is found using a standardised test, so the values can be easily compared.

2019年8月31日 · We explain down fill-weight vs fill power to help you choose a down jacket for different mountains based on weather conditions.

2024年1月26日 · It’s a number, usually between 500 and 900, and it is a general measure of how warm a down-filled item is. More precisely, fill power tells you how much volume a 30-gram, or one-ounce,...

Fill power measures the loft (or fluffiness) and effectiveness of the down insulation, or how much space it occupies when fully expanded. Sometimes fill power is referred to as “loft”. The higher the fill power, the better the down's ability to trap warm air and provide insulation.