I believe the US military went through this with Dragon Skin a few or more years ago to the point where DVA said soldiers injured while wearing it may not be eligible for coverage. Looking at
@KevinB for more details?
Oh Dragon Skin.
I bought a set when in Iraq.
Its only real claim to fame was mobility - it was flexible as the hard plates were in overlapping disks. It was flexible due to that, although heavier than most US issue LIV plates.
Unfortunately in the heat, the disks came loose from the soft armor backer, and resulted in gaps in coverage (disk migration, was the term, probably as they went SUL, —> south - or down…)
- It gave great multi hit ballistic protection up until that occurred - then gaps where effectively only LIIIA soft armor. At the time I was concerned about 7.62x54R AP and APIT ammo,
We ended up shooting it up on a range, and I ensured I went with a JSOC approved plate and helmet every after.
The US Army originally was strongly recommending that it not be worn, then banning it all together when the disk ‘migration’ issue popped up. I don’t know if anyone was actually injured using it - but it does highlight the potential issues for COTS PPE, and one needs to do due diligence if one is going to acquire non issued PPE.
Some of the Polymer Plates also created issues in GWOT. They were an exceptionally light weight option, and they did great again 7.62x39 rounds. They also would delaminate in the heat, and didn’t do great against 5.56mm SS109 type projectiles
So they became popular with some units.
Generally some unit somewhere has likely tested pretty much most gear, and as long as one understands that their criteria may be different than one’s own mission set, one can get a good sense of what performance of those items should be.
If one wants to be on the bleeding edge of technology, one needs to have a JSOC funding level to acquire and test that sort of stuff with any kind of certainty of performance, because generally 99.999% of manufacturers will highlight the pro’s and minimize the cons.