Auto vs Manual SOSpenders
I am a big believer in the delayed action auto-inflate. This is the new model that can be worn in the rain without inflating. From what I have had read, getting trapped is far less common than ending up over the side in a diabled condition. Even if it does push you up into a capsized hull you are more likely to be able to get out of that than stay afloat in foul weather gear and seaboots.