In reply to DinoRock: "Ideally looking for water proof fabric"
its alright until you open the lid to get anything out and then all of your kit is wet! best bet buy a bomber bag (non waterproof) and put all of your contents in seperate dry bags, thats the best way to keep things dry.
Ive had convorsations with people i know and they reccomended to me that i get a Pod Black Ice, all round bag rather than buying one for cragging and one winter climbing, get one that can be stripped down for summer and full size for winter.
Im saving up for one now, not cheap but is a bombproof bag!
Dickie