Of all the cold weather headgear I tried over the years, this is hands down the best. The wool blend both insulates and breathes, so it makes an excellent cap for active lifestyles. The warmth to weight ratio is outstanding and because it's not bulky it's perfect for wearing under a bike helmet. It's also comfortable and durable, holding up well despite many washings. Highly recommended.
Rating: [5 of 5 Stars!]