I believe this material can be used throughout the year as it is not wool. It's a World product, so it's well-made and has a luxurious feel, and is quite durable. It seems to be made of a material that won't pill or lose its shape even with heavy use. It fits snugly on the head and looks stylish. The color is gray, with pearl decorations. Circumference 54.5 cm x Height 9 cm Material: Acrylic Rayon Nylon New, including shipping Price: 2990 yen + tax