Jawin Heated Pants with Built-in Heating System. The entire pants warm up in just 15 seconds after the switch is turned on. There are three heating areas: two on the thighs (left and right) and one on the lower back. The temperature can be adjusted to your preference with three levels. Materials: Stretch Taffeta (Outer: 100% Polyester / Lining: Upper - Polyester Mesh Lamination, Lower - Polyester Stretch Taffeta / Padding: 60g Quilt) Specifications: Dedicated Battery (USB Type-A), USB Charging Cable (USB Type-A/Type-B) Functions: Heat Retention, Built-in Heating System *The product will be shipped in a paper or plastic bag with the outer box inside.