Cotton provides the material base.
The cotton core is soaked thoroughly.
Repeated outdoor drying requires suitable weather.
Cotton is soaked in hot ginger juice and dried in sunlight, repeating the process nine times.
Prepared cores enter waist, knee, neck and ankle products.
Four aspects of warmth: place, material, process and wearing experience.
The Four Yangs is the brand's cultural description of the Jiujiu range and its craft. These are everyday warmth products, not treatments for disease.