Sam Fisher- Shroud

  The dozens of cameras located throughout the shaft were equipped with NV, laser-based beam sensors, and infrared cameras. If something moved or gave off heat, it would be detected. Knowing his chances of successfully climbing one thousand feet of elevator shaft while playing cat-and-mouse with the sensors were nil, he'd turned to another rule from the special operators credo: KISS. Keep it Simple, Stupid.

  In this case, the simple solution came from the secret vaults of DARPA. Like most DARPA inventions, this one had an official moniker that involved a lot of incomprehensible letters and numbers, and like most DARPA inventions it also had a nickname: Shroud.

  Essentially a heat-dissipating and radar-reflective blanket, the Shroud could for short intervals defeat infrared cameras and sensors. There was a catch, however. The user had to remain perfectly still and the coverage lasted only sixty to seventy seconds before his body heat overwhelmed the Shroud's dissipaters.
...

  Fisher stood with his back against the wall, then reached over his head, grabbed the edge of the car's roof, and chinned himself up. From one of his tac-suit pouches he withdrew the Shroud, unfolded it, then slipped his left hand and both feet into the hemmed pockets, drawing it taut across his back. He laid himself flat on the car's roof. With his free hand, he scrolled the OPSAT screen:

  //ELEVATOR: NORTHEAST TWO//

  //STATUS: IDLE, LEVEL SUB ONE//

  //CALL TO THIS LEVEL? Y/N

  Sam punched in "Yes," then "59." The Shroud wouldn't conceal his body heat long enough to reach the penthouse level; he'd have to do last floor the hard way.

  "Ready, Grim," Fisher said.

  "Releasing cameras to hotel control."

  With a slight shudder, the car started upward.
...

  AS the car rose, Fisher slowed his breathing and concentrated on remaining still. In his mind's eye, he imagined the guards in the hotel's security center watching a split monitor showing both NV and thermal views. The Shroud would give nothing back, a perfect square of darkness on the car's roof.

  Unless, Fisher thought. Unless his foot was sticking out, or the Shroud had failed, or--

  Stop, he commanded himself.

- Checkmate, Chapter 19, 20