Features:

• This underwear set effectively reflects body heat back to maintain a stable body temperature, ensuring comfort and warmth for the wearer.
• Isolate and keeping cold air out of your body
• Single guide moisture technology, the moisture will carried away from your body keeping your skin dry and comfortable at all times
• Made of bamboo charcoal fiber, effective at traping heat 

Specifications:

• Weight: About 320g
• Fabric composition: 65.2% Polyester (bamboo charcoal), 26.7% Polypropylene, 8.1% Spandex
• Size chart can be found at the bottom of this product description.