Try Kriega.
http://www.kriega.com/uscombo30-drybag/
I bought the above (see link). Went touring around the scottish isles and it worked brilliantly. Was water proof and I could quickly detach and re attach it, plus being two bags, I could just detatch the top bag if needed too. Handy on the ferry to carry my camera kit!
http://www.kriega.com/uscombo30-drybag/
I bought the above (see link). Went touring around the scottish isles and it worked brilliantly. Was water proof and I could quickly detach and re attach it, plus being two bags, I could just detatch the top bag if needed too. Handy on the ferry to carry my camera kit!