When clothes get wet, they lose about 90 percent of their insulating value. Wool loses less, as do many of the new synthetics. Cotton and wet down are worthless. Beware of the wind. A slight breeze carries heat away from bare skin much faster than still air.
Wind drives cold air under and through clothing.
Wind refrigerates wet clothes by evaporating moisture from the surface. Wind multiples the problems of staying dry. Direct sunlight on the skin helps in the warming process. Understand the cold. Most hypothermia cases develop in air temperatures between 30 and 50 degrees.