Chest chutes
We had the chest type chutes on the Varsity for certain exercises in the 60s as I recall them being carried on the Varsity in the 80s on the fog flights, just in case the kit failed
The chute fitted into two clips on the pack you were already wearing and on release the hooks were dragged from the chest houseings to hang above you
I did the Para couse in the 60s and there was always a great deal of thought about the need to use the reserve chute if the main developed a serious problem like blown gores or a loop over
As I recall they said if you seemed to need it deploy the chute and if you could get it to fly use it if not leave it alone