Smith, Sundance PMT Goggles All Cross Country Skiing >>> Cross Country Skiing by Smith More details and ordering info. PMT (Perforated Membrane Technology) offers improved performance through an active ventilation system that clears fog by allowing moist air to evacuate from the inside of the goggle. Ideal for those who insist on enhanced fog-free reliability. The Sundance offers streamlined styling for unobstructed vision. User input on Sundance PMT Goggles by Smith: Be the first to submit input on this product Submit Input: Your Name: Write or Paste Input here: Upload picture:      Review Guidelines