content: Assuming it's mostly Kevlar, very good. Kevlar (and its chemical cousins) are widely used in heat resistant things like oven mitts (those giant yellow fluffy ones) and fire-resistant gloves. That being said, he's not completely wrapped in Kevlar and the gas definitely soaks in so he's probably got some 2nd degree burns in places with little protection like joints. So...he probably walked away but it's still a life changing injury.