As you would expect from a ruffwear product this is very good in almost all aspects.
Durable, reasonably light weight, good magnetic closure and almost waterproof (it will withstand a good shower but won't stay 100% dry - of cause there is the trade off between quick access and waterproofness.), it's small enough to hide under your rain jacket.
What's makes this product a 4 star instead of a 5 star product is simply the back.
1) the included belt is very slim and seems to be of a lesser quality than other ruffwear belts/buckles.
2) the loops on the bag are simply too small!
So if you decide to not use the included belt you might just want to attach it to yours or your leash. Sadly the loops are so small you won't be able to get ruffwears own leashes trough. For instance the roamer leash. You can still attach it fairly well with the clip but it's just not as secure.