Built to stand the test of time, the #558s are turned up to the max. All the durability. More comfort. More shock absorption. These boots will become your best companion.*Leathers referred to as waterproof are routinely tested for resistance to water penetration up to 12,000 / 15,000 flexes using one of the following SATRA test methos: TM171 using SATRA STM703 Bally penetrometer (or equivalent) or TM34 using SATRA STM606D Maeser type WR tester (or equivalent)