The 4 layer construction Thermal Rebound lining. This technology goes back to the mid 1970’s where NASA developed the thermal blankets for their manned missions into space as insulation.
Since 2011 the same principle is used on all major sporting events where Athletes are draped in shiny silver blankets when they finish. This effect of survival blankest for the protection against cold conditions is now available in our neoprene wetsuits.