bf056c96_Cassin_Ridge___Mountain_Trip__Description
[Gear] Base Layer Top [Guide's Pick] Capilene 2 Crew [Description] 
(1 or 2 sets) Synthetic layers work well, such as Capilene 2 or 3 from Patagonia. There are some really nice Merino wool options on the market as well. One set it sufficient for most expeditions and for overnight trips, however; the choice as to whether to bring a second set is a personal one, based on your level of comfort with wearing the same clothes for days or weeks at a time.
Cassin Ridge - Mountain Trip
Description