Jesse has liners that match the bags and I do have their liners.,,,work fine but I find that "compression bags" (from REI, WallyWorld, etc) really work well.
I have all my rain gear compressed in one bag and inside of the right case LID. Jesse's provide a lot of extra space with the storage in the lids and being top loading you can compress a lot of stuff into bags.
If I'm in a motel I put all clothes, etc needed into one or two compressed bags for removal to a motel room, and simply leave things not needed in the locked bags.
Love my Jesses.