To reduce environmental load and develop sustainability, this beanie is made of blended yarn of recycled wool and recycled polyester. The wool is produced in Japan by recycling wasted materials, including secondhand clothes and scraps from domestic sewing factories and spinneries, while the polyester fiber is made from wasted plastic bottles. Therefore, the fabric of this item has both heat-retaining, moisture-wicking properties of wool, quick-drying, durable, and lightweight properties of polyester.