However, tzitzit's (oft. called fringes) are a commandment.

Num 15:38  Speak unto the children of Yashar’el, and bid them that they make them tsiytsith in the borders of their garments throughout their generations, and that they put upon the tsiytsith of the borders a ribband of blue: 

Deu 22:12  You shall make fringes upon the four quarters of your vesture, wherewith you cover yourself. 

Mat 9:20  And, behold, a woman, which was diseased with an issue of blood twelve years, came behind him, and touched the hem of his garment: