How do the Aether Down Jacket and Sapwood Down Jacket differ in the type and amount of insulation?
You want to gauge the warmth of the two down jackets, but it is difficult to compare at a glance what kind of down and how much of it is inside each.
The Aether jacket is filled with 213g of goose down and the Sapwood jacket is filled with 170g of duck down, showing a clear difference in both the type and amount of down fill.
Aether uses goose down, and Sapwood uses duck down. ostrya's Aether Down Jacket is filled with 90% goose down and 10% feathers[1], while the Sapwood Down Jacket contains 80% duck down and 20% feathers[2]. Generally, goose down clusters are larger than duck down clusters and trap air better, providing superior warmth even at the same weight.
The amount of fill also differs. Based on size L, the Aether Down Jacket contains 213g[3], and the Sapwood Down Jacket contains 170g[4]. The Sapwood Down Jacket holds 170g of 600 fill power duck down[5][6], making it comfortable to wear without feeling bulky in the city or during light outdoor activities. In contrast, since the Aether Down Jacket is thickly filled with 213g of goose down[7][8], it is suitable when you need to maintain body temperature in harsh midwinter cold.


The fill power value for the Aether Down Jacket has not yet been confirmed in official materials.
Product measurements
View details
26FW Aether Down Jacket Abyss
Measurements
| Part | Value |
|---|---|
| Weight | 213g |
26FW Sapwood Down Jacket Natural
Measurements
| Part | Value |
|---|---|
| Weight | 170g |
| 무게 | 0.1g |
Other stated figures
| Part | Value |
|---|---|
| Nylon ◦ | 10cm |
| Shell ◦ | 100cm |
For rows marked with ◦, flat measurement or circumference could not be confirmed in official sources, so hmmm determined them using figures from the same item.



