Vectran

So I was in a chair sitting comfortably, but I had a second harness on.

So I'm, I had to detach myself completely from my ascending gear, put my descending gear on a different halyard, which was a Vectran halyard, um, so zero stretch.

Um, and I was on a climbing rope, which is 11 millimeters, and I had to put on a 10-millimeter halyard.

Uh, and so I moved all the gear across.

The restraint layer works with the pressure bladder to control the ballooning effect that would otherwise make the suit unusable.

This layer is made from high-strength woven fabrics like Dacron, Kevlar or Vectran.

These materials can withstand tremendous tension without breaking or tearing.

The restraint layer is not elastic like the bladder.

Aramid fibers like Nomex provide flame resistance better than anything previously available in aerospace applications.

Waterproof breathable fabrics like Gore-Tex eliminate problems with moisture buildup that plagued early suits.

High strength fibers like Kevlar and Vectran provide protection without excessive weight.

The materials themselves are achievements of engineering.