Hi Vinnie,
We will be releasing more details around Kevlar® soon. There is an image of a kevlar beam on our materials page: https://markforged.com/mark-one/the-materials/

It is a continuous fiber that uses our patent pending CFF™ process. Kevlar has awesome abrasion resistance, but isn't as stiff as carbon. We are very excited about the possibilities and applications.

Stay tuned for more info!