Our 2-way stretch fender covers are computer designed, and knitted on automated machines, to have narrow elasticated necks at each end.
This allows the cover to fit over the wider diameter of the body of the fender, then to automatically become smaller at each end, fitting neatly over the narrower top and bottom of the fender.
This avoids the need for fiddly drawstrings to be tied at the ends, and gives a neater finish.