Ulrich Rülein von Calw's Leather Mining Apron

Ulrich Rülein von Calw‘s Leather Mining Apron
Origin	Ulrich Rülein von Calw
Type	Leather Mining Apron
Effects	Users’ skin becomes tough as coal and immune to pressure and coal dust.
Downsides	User turns easily flammable
Activation	Wearing
Collected by	Warehouse 11
Section	Homobonus-MT8
Aisle	344238-5094
Shelf	558487-5902-525
Date of Collection	October 9, 1754
[Source]

Origins

Ulrich Rülein von Calw was a scientist and mining engineer in Germany from the 1490s up to 1523.

Effects

All skin covered by apron becomes as tough as coal and the wearer becomes immune to weight on their covered skin, coal dust, and extreme pressure (e.g. underground pressure). The wearer also becomes extremely flammable, and can catch on fire when exposed to temperatures higher than 100 degrees Celsius (212 Fahrenheit).