What is the difference between the Endeavor 8000 Pro pack and the Endeavor Summit?
Both packs were designed for Ed Viesturs. The Endeavor 8000 pro is large enough to carry the massive loads he needs for Himalayan climbs. On approach he uses the smaller Summit version and the Yaks carry the heavy stuff while he acclimates to altitude. The Summit is a great pack for training and alpine-style adventures.