Inclusion Criteria:  - Must have a current diagnosis by a physician of Raynaud's Phenomenon/Syndrome  Exclusion Criteria:  Those with active ischemic digital ulcers or gangrene as the cold exposure can be a safety hazard for them. Inability of the subject to place their hands into the PTD portal because of physical size or discomfort. Inability of the subject to wear protective eyewear. Anyone, who in the judgement of any of the investigators, would be unable to safely complete the study procedures. Females who are pregnant. Adults unable to consent for any reason not explicitly stated herein.