The IH-634S is Iron Heart's signature jean in their world famous 21oz fabric. It is quite possibly the jean against which all others are measured. The jean equivalent of the "Most Interesting Man in the World". This jean features super heavy 21oz denim that is so soft it feels much lighter because of it's loose weave. The break-in of these jeans is easy, despite the weight and heft of the denim. The cut is based off the 1966 Levi's 501, a straight fit with a medium rise and slight taper at the bottom. These jeans are sanforized so no need to soak these guys before wearing. Throw them on and you won't want to take them off.