Utilising a double-twisted weft yarn, this medium-tension 21oz weave is one of the softer heavyweight denim in the Iron Heart lineup, providing comfort and breathability with a relatively gentle break-in period. Superblack Fades-To-Grey (SBG) denim is woven with a sulphur-dyed warp yarn and a reactive-dyed weft. The warp will fade to grey, while the fade-resistant weft will remain black, resulting in striking fade patterns with wear and washing.