Rabbit down is the lightest and best material for keeping-warm in all the fibre of animal of animal used. It has powerful ability of absorbing sweat, keeping- moisture. People who are of dry skin find that wearing rabbit hair clothing can keep moisture of skin and absorb sweat effectively. But when the moisture of your clothing exceeds some degree .It can adjust your skin humidity automatically. So it is the best choice to make keep-warm and healthy underwear.