The Dry Bag From Skylotec
This very bright orange dry bag from Skylotec will keep your gear or rope dry underwater!
Durable material with good quality webbing and nicely padded shoulder straps make for a great value, very comfortable rope pack.
The Medium version will stow 170m of 11m rope.
The Large version will stow 280m of 11m rope.
These figures are from Skylotec and I believe they are a little generous. I wouldn't try and load them up that much.