Kevlar vs. Teflon — What's the Difference?

Kevlar (para-aramid) is a heat-resistant and strong synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at DuPont in 1965, the high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tires.

Polytetrafluoroethylene, PTFE

(uncountable) (Fabric, cordage, etc made of) aramid fiber, an exceptionally strong, light, man-made fibre used to strengthen cables and sheet materials, e.g. in stab-resistant vests.

(metaphorically) Non-stick, slick.

A piece of personal protective equipment made from Kevlar, such as a helmet or a vest.

Able to easily shrug off or deflect criticism or blame.

A material used to coat cooking utensils and in industrial applications where sticking is to be avoided

Not to be trusted;