Galway Felt Flat Cap Black Six Types of Air Ducts Most Common Kinds of HVAC Ductwork. Rediscover classic charm with the Galway Felt Peaked Cap an effortlessly stylish ivy cap crafted from luxurious wool felt. Inspired by timeless sophistication and versatile enough to match your mood, this cap brings fresh flair to a traditional silhouette. Soft to the touch and conveniently crushable, it transitions seamlessly from refined peak forward looks to casual, beret style elegance, making it a wardrobe staple for any season.