Author name: Dan Timmerman

Part of the testing I do is keeping tabs on some of the long term usage pieces I have circulating around to see how different aspects are holding up. One area of interest is down loft durability. It is my opinion that in most cases, loft loss observed in down gear is due to oil […]

If someone is attempting to assess the general insulation of a panel of a down item, they would need to know two main things. On one hand there is measured loft, which is the physical space filled with insulation. The other is the quantity of fill in that space. Both Total fill weight and calculated

If you hold a measured loft constant, but you add more fill to it, density goes up and insulation goes up. That is misunderstood as higher density is warmer. If we reverse it and hold the fill quantity constant but reduce loft, density goes up and insulation goes down. The correct conclusion would be that,

After the last round of testing down performance in wet conditions, the take-away was that the loft loss that happens when down gets wet, happens when wet down is compressed. If the trapped air in a lofted chamber is maintained, it’s rather difficult to get it wet. You can dunk a lofted chamber under water

The new pocket design is aimed at limiting some of the negative effects pockets can have on garments with loft. Therefore, there are some notes to be made on their use. The bag of the internal pocket is intentionally not connected to the garment. It is only connected at the entry point and at the