What fits one does not fit another. Reading the reviews by our customers you may build up the courage to make your first order. One hundred days satisfaction guarantee is created to make your risk as a buyer as small as possible. This applies to just one and just the first pair, and this condition is meant to reduce our risk. It makes no sense to go all out and start testing your own underwear satisfaction level by buying several pairs. One pair  for testing is enough to figure out if this underwear brand suits you or not.