fill power for high altitude

Quick Reference: Down Jacket for Nepal Treks Your trek Max altitude Fill power you want Fill weight (down) Rent or buy? Annapurna Base Camp 4,130 m 650–800 150–250 g Rent is fine Everest Base Camp 5,364 m 800+ 200–300 g Buy if you trek often Gokyo / Three Passes 5,420 m+ 800+ 250–350 g Buy Manaslu Circuit 5,106 m 700–800…