Kosher and comfortable way to observe the Mitzvah (commandment) of Tzitzit wearing. Lot of time and effort has been vested in this revolutionary Tzitzis garment. The main objective was to reduce the amount of sweating by changing the fabric type to a 100% cotton just as your everyday undershirt. In addition it was needed to overcome some Halachic (Jewish Law) hurdles to make it possible to combine the Tzitzis with the undershirt so you wear 1 instead of 2 garments. Great choice for all seasons and all ages.