Magnet's hold it tight, on my Z650RS. The bag is large enough to hold my leather jacket, gloves, and still have enough room for bits and bites. (Drink, and snacks).
Clear map holder is small, but can hold a large iPhone, and the touch screen will work with gloves off.
Well built, rain cover works well.
Ideal for day trips, commuting to and from work.
Got this bag from some adventure touring on my RE Himalayan and it fits it perfectly. The magnets keep it secured, even fully loaded and bouncing around off-road. I could fit a lot into it including my water bottle, sunglasses, hat, wallet and other items needed throughout the day. The cell phone holder on it is great too. It sure it nice having your phone inside and not getting covered in dust like it would be on a handlebar mount. There was no issues using the touch screen through the window.
Good and interesting for Ténéré