William Ellery Conifer Wool Hat Hand Knit in USA Natural base with tan and olive line 100% Peruvian Highland Worsted Wool 11” unrolled (Large) 10" unrolled (small) Fits well on most heads These wool hats are standard issue on all William Ellery Expeditions. They provide the crew with regulated warmth even in wet conditions, and provide safe visibility of each member at a greater distance. Peruvian Highland Wool comes from a sheep crossbreed of Corridale and Merino. These sheep live in the Peruvian Highlands 2000m above sea level.