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Icebug Insoles FAT Medium

photo: Icebug Insoles FAT Medium insole

Really supports the arch well. Works well with large volume footwear. An effective replacement for inadequate footbeds.


  • Designed for large volume shoes
  • Good arch support
  • Available in three arch heights
  • Trimable for a custom fit


  • Designed for large volume shoes

The Swedish company Icebug not only makes a wide range of outdoor footwear but they also make some really good insoles. The heart of the Icebug insole is their Arch Flex System which provides dynamic support for the metatarsal area of the forefoot, the midfoot arch, and the heel cup.

Construction starts with a low friction top cover for comfort over a breathable open-cell foam which is bonded to shock absorbing EVA foam. Molded plastic wraps from the heel up to the arch for that dynamic support and under the heel, Icebug's Double-Arch designed shock absorber helps rebound your foot's energy with each step.

The insoles are also available in Slim and Fat for low and high volume footwear. Three arch heights are also provided to fine-tune the insoles to a variety of feet and footwear.

In late May I received a pair of Fat Medium insoles for extra cushioning with a medium arch in a size 9+ and have been testing them ever since. The insoles come in a plus size so they can be trimmed to fit properly in a wider range of footwear.

Initially, I tried to insert them into a pair of Altra trail runners but the Altras just didn't have enough volume for my feet to be comfortable. I then inserted them into my Carhartt slip on work boots. The Fat insoles did a nice job of filling up what is large volume boot and my feet felt much more secure.

My first impression was that they had much more support than the insoles that had come with the shoes, which had been comfortable but lacked support. The instructions that come with the Icebug insoles state that they will take some time to mold to your feet. I found that to be true especially in the forefoot region where you could feel the metatarsal support. After about two weeks of use the insoles really started to be very comfortable. The insoles' top surface keeps my foot from sliding around and I actually do feel a bit of rebound effect as I walk.

I am really happy with these insoles. The support and comfort are first rate. My next step will be to try a pair of slim insoles in those Altra trail runners as I have always felt they convey a little too much of the trail to my feet. 


Product details:

  • Sizes: Men 4-13, Women 5.5-12
  • Thickness: Slim, Fat
  • Arch height: Low, Medium, High
  • Cost: $46.95


Source: tested or reviewed it for the manufacturer (I kept the product after testing.)

Disclosure: The author of this review received a sample of the product from the brand or its representative in exchange for a review.

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Price MSRP: $46.95
Current Retail: $49.95
Historic Range: $46.95-$49.95
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