Have you ever had one of those straps on a camera bag that just slip straight off your shoulder?
I have quite a nice bag with one of these hopeless slippy straps - unfortunately the strap is sewn on, so no handy clip on replacement. What I need is an added shoulder pad which will clip round the top of the strap, and one which has a rubbery friction side that holds securely.
Billingham does something like it, but I don't know how grippy it is or if it fits:
Thinking something like this -