Wright says, “The tunic (inappropriately translated ‘coat’) was a shirt which was worn next to the skin.  It was made of leather, hair-cloth, wool, linen, or in modern times, usually of cotton.  The simplest form of it was without sleeves and reached to the knees or sometimes to the ankles.  The well-to-do wore it with sleeves and extending to the ankles.  Women as well as men wore it [see Cant. 5:3, A.R.V.], although there was no doubt a difference in style and pattern in what was worn by the two” (Fred H. Wight, Manners and Customs of  Bible Lands, 91).