The ruck sack is a Kriega R35, 35ltr with plenty of pockets, webbing and compartments. It has a fully adjustable and well padded harnes which spreads and transfers the wind loading onto the chest instead of the shoulders. I have only used this once for a 1700 mile trip and had enough space for 5 days of clothing which was kept completely dry. A conventional ruck sack is no comparison, this is so comfortable you would not know it is there (even at 130mph Digger!
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The tail pack is a US-10, which is has a capacity of 10ltr and is 100% waterproof.
Again, only used once. I kept my wallet, pasport, phone & camera in this with room to spare. The tail pack has straps to fix to the rear seat/cowl or it can be fitted to the ruck sack.
Both of these items are really excellent kit and will not let you down. Just google either item description and you will see the full specification and rrp. They cost me £144.00, I am looking for £75.00 + p&p for the pair. Please p.m me. Phil.