Looking at our early customer feedback, people suffering from Raynaud’s have found different levels of relief, ranging from purely positive responses to mixed reactions.
Embr Wave was designed to create a pleasant, localized sensation on the inside of your wrist (where there are more blood vessels) for your body to re-focus on without altering the temperature anywhere else on your body. Our impression is that while it doesn't generally resolve the problem, it can help people feel less bothered by the cold.
Here's an article that the Raynaud's Association wrote about Embr Wave recently: http://www.raynauds.org/2017/10/24/more-product-developers-chase-frostie-market-potential/
And here's a review video that one of our users with Raynaud's made: