UP Insulation 3 oz

(6 customer reviews)


UP is a performance-oriented technical insulation that is lightweight, compressible and completely water resistant. UP has maximum warmth and can be used in large baffles in places where consistent dampness and compression can potentially be damaging to down.

weight: 93 g


UP insulation feature a unique synthetic cluster built around the finest water resistant fibers of varying deniers and composition to mimic the natural down cluster better than any existing blowable synthetic on the market. By using deniers ranging in size – some smaller than one denier – the UP cluster is able to bind to each other better to provide more warmth and greater durability. Much like down, UP works by trapping air providing maximum insulation for a given weight.


UP has tested to be warmer than a 600 fill power Goose Down when tested for warmth based on equal volume. While no synthetic can equal the warmth to weight, compressibility and resiliency of down, UP makes up for it with sheer durability and water resistance.


In independent testing, UP has shown to have a loft equal to 625 Fill Power.


A synthetic insulation is only as good as its durability. Having been tested under harsh washing condition, UP is able to withstand 20+ repeated washings showing no discernible cold spots or clumping in baffles up to 3″ x 10″. With the warmth close to a 700 fill power down and able to be used in larger cold weather products, this new blowable insulation is one that finally transcends the small, lightweight jacket baffles common seen in comparable insulation.

Sold in 3 ounce bags.

Additional information

Weight 93 g
Dimensions 1 × 1 × 1 in

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5 out of 5 stars

6 reviews

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2 reviews with a 5-star rating

  1. 2 out of 2 people found this helpful

    Synthetic up insulation

    combsie77 (verified owner)

    Ordered 12 3 oz bags of up to make a topquilt and underquilt for my diy hammock. Used half in the underquilt and half in the topquilt. My baffles are 2.5 inches and both are full size (54 by 76). total weights are just under 2 lbs for each and i probably should have added more insulation because the baffles are a little flat. The quilt is warm and light enough for me. The ion fabric is also nice and breathes well enogh that i didnt sweat. Up is a great alternative to down (I am allergic) just be sure you order some extra because it doesnt fill out as much as a really high quality down. packed down size is pretty good too top quilt fits in a round bag 6 by 10 very easily and if i compress it by hand i can push it down to half that. My quilts should be good for about 30 degrees. Ill try to remember to post some updates this winter. Thanks dutch. As always a happy customer. PS total cost for project was under 200 bucks for both and total sewing time was a little over 12 hrs (first try and i don’t go for perfect looking seams).

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  2. Jake Sorensen

    Best Synthetic Insulation to Date

    Jake Sorensen (verified owner)

    I made a 20 degree top quilt and was very impressed with this insulation. Very light and lofts very well. It seems to migrate much less than down, and can be stuffed with very minimal mess (unlike down). Before getting too far into the project I made a test compartment with some scraps to test the fill power, compression, and durability after multiple compression cycles and it performed great. I’m sure a lot of work went into developing this and it shows.

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