I'm going on a trip to Alaska in September, including a guided camping/trekking trip in Denali. In the packing list I received from the company, they recommend having an "expedition-weight" top and pants as "extra layers". What, exactly, does this mean?
I've seen "expedition-weight" as a descriptor for fleece tops, but I've never been clear on whether there's a standard definition of the term. Does it only apply to polar fleece, or to other materials as well? Does it refer to a certain thickness/density of fibers, or just to a degree rating?
For what it's worth, this is what the list says under the "extra layers" category (separate from the regular layers of t-shirts, mid-weight synthetic tops and bottoms, synthetic hiking pants, and rain gear):
- Expedition-weight synthetic top
- Expedition-weight or fleece synthetic bottoms
- Fleece or synthetic/down fill jacket