William Ellery Tunnel View Hat in Jade When John Muir had to convince Teddy Roosevelt to protect our lands, ultimately leading to the creation of the National Parks, he took him to Yosemite. The entrance to Yosemite is through a tunnel about 2 minutes long. When you emerge into the valley, the Tunnel View emerges, showing you exactly what made up Roosevelt’s Mind. William Ellery 5 Panel RL (Regular Low) Construction, specifically designed to be the right height for most heads. Sitting above the ear, and having ample room in the circumference on the crown. Satin Woven Nylon USA made, Military spec adjustable rear strap and ladder lock. One Size: Large Woven W<->E Flag Cut and sewn in NYC, USA