They’re in the older Calimacil style. The tips have changed to more natural shapes. I wonder if this a clearance lot. But no, not coreless. And stab safe means they won’t gut you. But I have tested this with my wife and I took a thrust to the gut in the interest of science. Kind of like being punched… no injury but a little harsh.
I fought with my calimacil blade in quest to the forest of darkness this year, it requires a lot more effort to pull blows as it is several times more heavy than the standard latex.
Edit:
Pros
Stab safe - note - the core won’t come through but the tip is quite solid
Durable beyond any other blade
Great defensively as they are heavy and block exceptionally well vs. standard foam latex
Sword in hand feel - the molded grip feels great and the blades have a nice heft (which is also a con)
Cons
Ugly tip
Heavy blades (physics means you either swing slower or pull the blow a lot harder or you will strike too hard)
Weird blade which can be quite solid when striking.
Not for beginners.