Helmet bag - a safe for your helmet

Every cyclist knows this problem in the city when shopping or when meeting friends in a café or for a beer:
Where to put the bicycle helmet?
Instead of taking it with you, you can now leave it directly on your bike. It is safely stowed away in the helmet bag. And if you ever need a bag for a spontaneous shopping trip, you can simply convert the helmet bag.
- Place the bicycle helmet on the saddle of your bike and pull the helmet bag over it.
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Then tighten the integrated safety rope and attach the helmet bag to your bike lock.