The Flex range has been expanded since it's initial launch with a greater range of models they now include leather models like the one reviewed here. The basic design is the same. You can swap the inserts around as in the first versions, with inside and outside pockets.
So the leather has a slight 'pebbled' finish but it is very soft and supple. There are no stiffening in the covers, these get their form from the inserts or the pen loops which are mounted on a thin plastic card.
On the inside front cover has three card slots plus a larger gusseted lower pocket.
The Flex comes with a slim lined note book and a jot pad and a single pen loop.
The gusseted pocket will easily take a smart phone such as my iPhone shown in the picture.
I've added a Filofax iPad Stylus Duo pen which neatly fits in the pen loop and I can use it to jot notes down if I get a call, and the soft tip works perfectly as a stylus on the touch screen, especially someone like my self who doesn't have particularly elegant thin fingers!
By adding a second pen loop, one in the front the other in the back, you can put your pen through both loops and this holds the Flex closed, a simple solution if you want a form of closure.
Naturally the phone increases the bulk of the folder, but it is still slim enough to slip in your jacket pocket
The Flex Leather Slim model is currently in the sale at £24 a very good price I think. They do a similar model to the Slim in A5 size too. They would make great partners. Or use the Slim with your normal Filofax even.
Again thank you to Filofax for sending me this Filofax Leather Slim Flex for review.