The Walletsafe 100 is a tough fabric wallet about 9cm by 12cm when closed, with a dark grey security chain about 35cm long that attaches to a belt loop to ensure that you and your hard-earned cash aren't separated. Inside it has a full-length, zipped compartment for notes, six slots for cards and one clear slot for identification, whilst another zipped compartment on the outside can be used for holding change. There's also a fabric loop on the inside to which you can attach a key.
The wallet itself feels very well made and is held closed by a long Velcro strip so on the whole feels very secure. It's also pretty smart, the version I got being almost totally black with only a small Pacsafe logo in the corner. It's perhaps not the thinnest wallet out there, but when you consider just how many compartments it has and how much it can hold, it's actually not that `fat', even when you've filled it up with cash, cards and change.
On the downside, the chain itself only comes with a 'push-type' clip which doesn't lock so it probably wouldn't be that difficult for a nefarious type to undo it from your belt loop without you noticing. The chain also tends to advertise the fact that you have something valuable at the end so in a way it seems like something of a mixed blessing. However, it can always be stored in one of the internal compartments or removed altogether so you don't have to use it if you think it'll make you look like an easy target (or a prison guard.)
When you consider just how much of an awesome responsibility a wallet has, it seems ludicrous that many of us (and I include myself here) are happy to entrust our lives to some of the cheapest, most fragile bits of tat we can find. I can't guarantee 100% that the Walletsafe 100 will save you from the poor house but my advice would be to get one, supplement the push clip with a locking one and it should make you a lot less attractive to pickpockets.