Premium Real Leather, Durable, Stylish and built to last Warm and Comfortable, Soft Merino Wool Interior Lining Traps Water repellent soft shell Primaloft® Gold Eco insulation Recycled lining Patented behind-the-head design Adjustable click-to-fit frames for a variety of head sizes Works with hats, helmets & glasses Fully collapsible for easy storage in a pocket, purse, briefcase or bag