Blog

Warmth Metrics in Box Chamber Construction

By Dan Timmerman | March 18, 2021 | 0 Comments

The total weight of the down fill in an item is the most often used method for determining the warmth rating of that item. However, despite it’s widespread use, total fill weight is a number that is subject to so many variables that it is far too unreliable to be used accurately to determine warmth. […]

Sewn Through Baffle Construction and Its Effect on Warmth

By Dan Timmerman | March 18, 2021 | 16 Comments

Any loose fill item needs baffles to hold that fill in place and give shape to the item. In most down garments on the market for 3-4 season use the baffles are created by sewing the inner and outer shells together. This separates the fill into separate chambers. However, at some point in time these […]

Down Fill Compression Test

By Dan Timmerman | March 18, 2021 | 0 Comments

DOWN FILL COMPRESSION TEST Goal:¬†Test whether down fill can be compressed to half it’s full loft and retain the same R-value. Footnote conclusions:¬†Down compressed down to 4″ has a significantly lower R-value than if it was allowed to expand to it’s full loft of 8″. Down compressed to 6″ has less R-value than it does […]

Drawcord footboxes

By Dan Timmerman | March 18, 2021 | 0 Comments

Drawcord footboxes have developed a reputation for being cold, but I feel it isn’t necessarily a shortcoming that is inherent to drawcord footboxes, but a shortcoming that is inherent to a certain design of drawcord footbox that happens to be the most common. The end drawcord. An end drawcord pulls the surrounding down in, but […]