Pacsafe Travel Security

Excellent product.

This helmet bag is a great compromise between having a topbox and either leaving your lid chained to the bike exposed to the elements and possible damage or having to carry it about. The bag seems well made with plenty of room for my medium-sized Shark lid and it folds away easily. It is slightly fiddly tightening the opening of the bag enough to expose the metal bead that keeps it locked in place but that will probably get easier in time. I haven't tried hanging the bag off the bike using the top loop, I would be afraid someone might undo the velcro strap and bring the thing crashing down somewhere - the cable is quite long and perfect for feeding through various bits to enable the helmet to sit snugly on a back rack or somewhere similar.