I did say early in the piece that I was happy with my choice of the (Black) HM Survivor for my Bass Strait crossing from Coldstream all the way to Hobart via Flinders Is (in a bubble canopy aircraft incidentally) & return via King Is route.
Incidentally when the lifejacket is activated out pops a YELLOW flotation unit.
No sanctimonious attitude here. I just answered Alex's question with my opinion on the brand of product he enquired about, that I happened to have experience with as per his post #1.