650 Fill Power Down Insulation Temperature Rating

550 fill power with 1 oz.

650 fill power down insulation temperature rating.

A 20 degree bag with 550 fill power may weigh for example only. Luxury down comforters will often have a fill power rating of 700 or above. Fill power is the volume in cubic inches that one ounce of down fills up. In the 550 650 fill power range will usually be too heavy bulky and cumbersome to wear for high intensity activities like climbing skiing or.

To sum up this example it should now be clear that you need a lot of low fill power down to do the same job as a small amount of high fill power down. Of down has a clo of approximately 0 92 800 fill power with 1 oz. 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. A high quality rating starts at about 550.

Of down has a clo of approximately 0 7 625 fill power with 1 oz. As a result lower fill power down garments i e. Like most of the parkas in our collection it features 700 fill power and 13 ounces of white goose down. The other jacket weather ratings associated with down are its down to feather ratio generally 70 30 80 20 or 90 10.

To avoid overheating they are typically very light. Not a true weight of the bag 5lbs and a 20 degree bag with 800 fill power may weigh 3lbs. How to layer with down. The warmest down jackets are built with a high fill power down and a heavier down weight.

Down fill power is a number you encounter even when you re not delving into technical specs or shopping for outdoor gear. The more down the warmer the jacket. 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. 800 many people consider 800 to be the highest possible fill power although others will claim that 1200 is possible.

Of down has a clo of approximately 1 68. Fill power ratings range from 300 to 900. In theory you could have 2 different 550 fill power bags with different. Although the temperature rating system has its flaws there are still other numbers figures and facts to consider when looking for a great down jacket.

Other top clothing brands like patagonia use 800 fill power down in their immensely popular down sweater. A higher number fill power will result in less down being needed to achieve the same insulation rating. Rei uses 650 fill power down in its wallet friendly co op down jacket. Fill power ranges from about 300 in oz or 175 cm g or lorch 75 mm 30g for feathers to around 900 in oz or 520 cm g or lorch 225 mm 30g for the highest quality goose down.

Just don t get it wet. 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.