The "Silk Wool Double Layer Warmer" was suddenly discontinued due to aging machinery, but after two years, a new "Silk Wool Double Layer Warmer" has finally been completed. The inside is knitted with undyed silk, and the outside is knitted with 100% New Zealand Merino wool yarn. It is fluffy and thick, so we hope you will use it by layering it around your ankles and other areas you want to keep warm. We hope you will enjoy the cold of midwinter. For more information, please see the product page .