As far as that link Dell, the sheath does protect the inner core, but to say that sand/dirt/rocks cannot get in there to the core and damage it is incorrect.
well fark... don't tell me... I'm not the author
I don't have the mp SLXD rope anyway,
just plain ole' mp superline
no matter... the shit is tuff as hell
had it since '04... abused it to shit, many a occasion
little frayed a coupla feet back from the eye end
but otherwise no visual wear
the colors do fade after time tho'
my rope was bright orange when new...
now it's light orange.
heard it can be re-dyed... never cared.
If the frayed part of the rope breaks one day...
I'll just re-weave a new eye end on the slightly shorter rope.
at a 100ft... I got an extra 20 ft to play with
meh... nothing is forever anyway
but it's nice if it lasts for awhile