Our signature cold weather range, ideal for winter or anyone that feels the cold. Supertherm® is mainly constructed from 4mm super stretch neoprene combined with thinner neoprene on specific panels where more movement is required. The top and longjohn are 4mm and come in unisex, womens and junior styles. The new Supertherm® steamer is a unisex fit and is 5/4/3mm neoprene to ensure the maximum amount of warmth and flexibilty.