I like to use wrist straps for deadlifts so that I can use a double-overhand grip on heavy sets rather than mixed grip. The problem is that the cotton straps only last a few months before fraying and wearing out. The knurling on my bar is pretty sharp, and there's usually a fair amount of chalk around as well, which probably doesn't help.
Does anyone who has used both cotton and leather straps have an opinion to share on whether the leather straps are likely to last longer? Are there any other advantages/disadvantages to the leather straps?