650 Fill Power Down Insulation Meaning

Years it will last. 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. Rei uses 650 fill power down in its wallet friendly co op down jacket.

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For reference the naked body has a clo value of zero and a clo value of 1 is what a person needs at room temperature.

650 fill power down insulation meaning.

Do not use fill power as a measure of firmness 850 fill power down pillows are not firmer than 650 fill power down pillows. Goose down is the preferred choice for lightweight products. If an ounce of down takes up 500 cubic inches of space then it has a 500 fill power. Of down has a clo of approximately 1 68.

The warmest down jackets are built with a high fill power down and a heavier down weight. 550 fill power with 1 oz. An 800 fill power product isn t guaranteed to be warmer than a 600 fill power product. The higher the fill power the higher the quality the higher it will loft and the longer it will retain its firmness i e.

Examples include the forearm shoulder and leg regions of climbing and expedition down jackets suits where it is able to resist compression better than higher fills. Fill power is expressed as a number such as 800 or 600 where higher equals more loft better insulation and better compression. 650 700 fill power is sometimes used in high contact zones of some active garments. Other top clothing brands like patagonia use 800 fill power down in their immensely popular down sweater.

How to layer with down. It uses the durable pertex quantum pro exterior with an 800 fill power down insulation for enhanced warmth designed to withstand the coldest climates. If you ve ever pondered the virtues of an 800 fill power down duvet with a 650 thread count egyptian cotton cover you ll know what i mean. Slightly lower fill power down i e.

There are a couple of 1 000 fill power jackets like the new rab zero g but those are novelty times that are too expensive and rare for mass production. Geese and ducks are the major sources of down insulation. 700 cubic inches equals 700 fill power. A 650 down fill jacket with 330g of down may be as warm as an 800 down fill jacket with only 120g but the 650 fill jacket will be bigger heavier and take up more room when stuffed in your pack.

For an extra tough jacket that s both high on warmth and high on style the men s blacktail down jacket combines 700 fill down insulation with a durable abrasion resistant shell. Fill weight how much down is being used seam construction fit zippers and other factors all have an impact. Of down has a clo of approximately 0 7 625 fill power with 1 oz. Of down has a clo of approximately 0 92 800 fill power with 1 oz.

Down fill power is a number you encounter even when you re not delving into technical specs or shopping for outdoor gear. However the 850 fill power pillow is higher quality and will last longer. Goose down is loftier higher fill power than duck down. 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.