Smell does not escape !
I have had my Dicky bag a while now and I have not had a single split poo bag since. I store a ball in it when we set off; the dog carries the ball home and by then the bag is full of poo.
I have the extra large bag 2 collies and a heinz 57 it is easily big enough. Most impressivly, I forgot to empty it last monday and 7 days later the smell had STILL not escaped from the bag!
I am so impressed...