People take that out of context and misinterpret it. It's a description of a vision, not Jesus' earthly body. It says his hair was as white as wool (not the same texture as wool), and that his feet were glowing like bronze in a furnace (so red hot, not brown). It also says there was sword coming from his mouth and his face was like the sun.
I turned around to see the voice that was speaking to me. And when I turned I saw seven golden lampstands, and among the lampstands was someone “like a son of man,” dressed in a robe reaching down to his feet and with a golden sash around his chest. His head and hair were white like wool, as white as snow, and his eyes were like blazing fire. His feet were like bronze glowing in a furnace, and his voice was like the sound of rushing waters. In his right hand he held seven stars, and out of his mouth came a sharp double-edged sword. His face was like the sun shining in all its brilliance.