I have very acute RSL. My legs have so much static electricity in them that they are hot at all times. I wear sandals 365 days a year; my feet never get cold. To disperse the energy in my feet, I will often stand barefoot on grass. This can help; but a metal manhole cover is better especially if its wet. When it snows I take my sandals off and will often work for hours in the garden without my feet getting cold. My partner has often taken photos of me working in the garden or clearing the snow off our drive when i'm barefooted. Even If I stand on ice in my bare feet my feet won't get cold.