The point of D3O is it stiffens on impact: It's not meant to stop an egg from cracking in such a circumstance, it's designed to spread an impact load over a larger area of the body. What a crap vid that totally does not get the point, eggstremely useless.
Custard powder with just a small amount of water is a great eggsample of thixotropic action, which is what D3O exhibits. Or Mānuka honey if you're posh. Very resistant to rapid change. A tea towel isn't. https://en.wikipedia.org/wiki/Thixotropy
D3O Ghost isn’t viscoelastic, whereas “regular” D3O is non-Newtonian. Hence, Ghost armour doesn’t harden with impact. Indeed, so perhaps the Ghost armour performed poorly because it didn’t stiffen with impact. I imagine “regular” D3O (i.e. the non-Newtonian stuff that hardens with impact) is significantly better than Ghost.
Non-Newtonian is related to fluids. Ghost isn't a fluid, so my comparion with custard powder with water was a bad one. Fair cop! D3O is viscoelastic: https://en.wikipedia.org/wiki/Viscoelasticity. When the egg hits the Ghost pad, the pad is going to temporarily harden - harder than an egg. The tea towel doesn't harden on impact - it cushions the blow. There doesn't seem to be any difference in material between the different D3O protective items, just a different way of creating them: 'normal'/original is moulded, so you'll have a moulded cupped shoulder pad, etc, and Ghost is 'printed' onto a backing fabric with gaps in the printed D3O pattern to let the item flex and fit the body. There are two variants of Ghost: Ghost Level 1 is half the thickness of Ghost Level 2 - 6.5mm thick versus 11mm*. And the protection from both variants is respectively EN 1621-1:2012 (Level 1) and LEN 1621-1:2012 (Level 2). EN 1621-1:2012 (Level 2) offers up to twice the protection of Level 1. In other words twice the thickness of D3O material = twice the protection. As ever, it's a trade-off of protection (Level 1/2, A/AA/AAA, etc) versus comfort (bulk, weight, flexibility, cooling). And never carry eggs in your inside pocket. *PDF spec sheets: https://www.d3o.com/partners/solutions/molded-parts/d3o-ghost-l1-limb-protectors/ https://www.d3o.com/partners/solutions/molded-parts/d3o-ghost-l2-limb-protectors/
… And there is the new D30 Diablo level 2 protection. https://www.motolegends.com/reviews/d3o-diablo-armour-review
Roadskin sell this for their products, really good. https://roadskin.co.uk/collections/motorcycle-jeans
