I've always been a bit worried about using a magnetic tank bag. It's the kind of place that I'd want to store my wallet, phone, camera and all of that stuff that is accessed regularly. However the strong magnets for the bag, combined with magnetic strips on credit cards and data cards for my camera seem like a disaster wating to happen. I asked my bank who advised not the subject cards to strong magnetic fields. I can just imagine being stuck out in the boonies with dead credit cards, no means of getting cash, buggered phone, and no photos of my trip.