99extra Underwear, Men's Low Rise Skinny Modal Briefs 95% Modal / 5% Spandex Imported Modal is better soft, thin, light, breathable and stretch than cotton It still keep soft, resist from fading or forming pills due to friction even after repeated washing. It is good to reduce the stimulation to the skin It absorbs 50% more water than what cotton retains and volatile ability is stronger than cotton. Keep skin to dry better than cotton underwear. It is relatively thin and breathable, quickly take away skin's heat. We know, lower temperature is benefit for male genital organ health. Doctor advised, a underwear don't use more than 6 months, it will become very dirty although you repeated wash it