Heat Holder Long Johns

Heat Holders Thermal construction holds more warm air close to the skin keeping you warmer for longer. This set of thermal underwear is the perfect set for layering as of its easily fitting design for under your clothes for a smooth slim fitting thermal base layer for the colder days where one layer isn’t enough! This thermal underwear set has a TOG rating of 0.39 adding that crucial extra layer of warmth. The higher the TOG the better the garment will keep you warm.