I am looking for a backpack to avoid using saddle or tank bags. I would like to be able to carry enough gear for a long weekend of sport touring but the primary purpose would be for carrying the daily necessities of commuting. Has anyone used the Kriega packs? How will they stand up in wet conditions? How easy or difficult are they to put on or remove over an armored jacket? with gloves? How much will they hold? Specifications say 25 litres(R25) and 35 litres(R35) but what does that mean in real life? Any input will be helpful, thanks in advance.