Crossbody bags are recommended for security on the reasonable grounds that a bag worn across your body is harder to take than one hanging off a shoulder. That is true, and it is only half the story. The same strap that resists a snatch also resists you, and there are situations where being attached to your bag is the more serious risk.
Where a crossbody genuinely helps
On a crowded platform, in a market, on public transport or walking through a busy street, a bag worn diagonally with the body of the bag in front of you is a sensible choice. The strap crosses your torso, the opening faces inwards, and you can rest a hand on it without thinking. That covers most opportunistic theft.
Where it becomes a hazard
The problems start with anything that moves. A strap across the body can catch on bicycle handlebars, on scooter mechanisms, on car doors, on escalator handrails and on machinery. If the bag is caught and you are not, the strap does not let go. Adjustable straps that detach or release, such as those on the crossbody styles at https://mexsus.com/, are the practical answer.
Children need a release buckle, not a rule
Telling a child not to wear their lunch bag on the slide does not work. A breakaway clip that pops open under a modest load does, because it does not depend on anybody remembering anything. This is the single most important feature on any bag with a strap intended for a child.
Which pockets to actually use
Outer pockets are convenient and they are also the ones a stranger can reach. Keep a phone in an inner zipped compartment on busy days and use the outer slip pocket for a travel card, tissues and other things you would not mind losing. It is a small discipline that removes most of the risk.
- Wear the bag in front of you in crowds, not behind your hip
- Use a release buckle on bicycles, scooters and for children
- Keep valuables in an inner zipped pocket, not an outer slip
- Shorten the strap so the bag sits high and close
- Never loop a strap round a chair leg to feel secure
The chair-leg habit
Wrapping a strap around a café chair leg feels clever and creates two problems: it does not stop a determined tug, and it turns a bag grab into a fall. Keep the bag on your lap or between your feet with a foot through the strap, where you will feel any movement instantly.
Resist the instinct to hold on
Advice from people who deal with street crime is consistent on one point: property is replaceable and you are not. A strap that will not release turns a snatch into being dragged. Wearing something you can shed is a better plan than relying on being able to hold on to it.
Simple habits beat clever features
Slash-proof panels, hidden compartments and locking zips are marketed heavily and used rarely. Keeping the bag closed, worn in front, and not opened repeatedly in a crowd will do more than any of them. Choose a bag with a zip you can close one-handed and you will actually close it, which is the whole point.