Camera bag accessories are extremely useful and can help to store all sorts of tiny camera accessories. Battery cases are really useful as they keep the contacts ont he batteries away from each other and waterproof rain jackets can be used for lenses and cameras. Memory cards like the Secure Digital card and the Compact Flash card have their own mini case, which avoids them getting lost, or you rumaging around in the large camera bag endlessly searching for the last SD or CF card. Replacement shoulder straps are available from Billingham and the cases for the ipad mini's and airbook accessories have see through fronts so you can keep an eye on and know everyhting that si in there. Really good for photographers who need to grab a bag and go.