Hi 1whitehorse1,
Any high concentration of dust particles can cause mechanical irritation to the lungs but this would apply to the factory workers that make the Kevlar and not to the final use product that is used by consumers that would never be exposed to anything close to the level of dust particles from the Kevlar fabric that could cause any harm. Even drinking too much water can be harmful
It’s been asked many times. You can see the details here.
Phoenix