Wool often has the stereotype of only being good in the cold. You can credit all the wooly sweaters and scarves you wear in winter, but wool truly is a 4 season fiber.
Think of a sheep. When they get a bit chilly, they don’t head to the closet and grab another layer. When they get warm they don’t throw on a cotton t-shirt. They only get one shot at it and Mother Nature has given them the perfect clothing to keep them comfortable year round in all kinds of conditions.