Dry or Double Dry?

[mountainmandoug]

I am contemplating the purchase of a half rope for mountaineering and I'm trying to decide weather to spend the extra $15 for double dry. Does anyone have experience with the difference between dry treatment on just the sheath vs. the sheath and core?

[letsroll]

go dryith sheath and core. if the sheath only water may and will get into the core seeping through the weave of the sheath. I have double dry and my ropes stay not mater what.