Skee-Tex Boot

"The Warmest Fishing Boot in the World"
 
Designed for all types of fishermen, farmers, mountain workers, cold store, and fish factory use
100% waterproof and guaranteed down to minus 50 degrees.
"This is the only waterproof boot I have worn in eighteen years of expedition work
which has kept my feet warm to minus 50 degrees".
Sir Rannulph Fiennes