Long John pants are nowadays worn as a cold weather base layer mainly in countries with cold climates. This garment prevents the body from a heat loss and provides comfort throughout the whole wear. However, back in the days, Long John's main function was loungewear and later on, Long Johns became popular as pyjamas. Especially organic toddler long johns served as sleepwear. Gradually people realized the potential of this garment and how to transfer it into the best base layer for men and women for outerwear.