Which 'bags'? Most of us are hauling backpack gear for camping off the bike - AKA adventure riding. My image shows complete gear for living in the backcountry for 5 days. The secret to light packing is good backpacking equipment that is light, durable, and compact. BTW, I never bother to lock my cases as I'm not away from the bike nor in the city. However a couple of small padlocks work just fine. And they are attached from the inside so not easily removed/stolen.