Cap by Herschel Supply Co, Cotton twill, Paneled crown, Eyelet vents, Flat peak, Herschel Supply Co logo detail, Adjustable strap, Wipe clean, 100% Cotton. Herschel Supply Co produces quality built backpacks inspired by vintage mountaineering equipment, American heritage and world travel. With a passion for individuality and personal style, Herschel Supply Co adapts to a new generation updating their bags with a modern fit, shape and feel.