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.. To create this overdyed variation, we steep a fully constructed 21oz selvedge denim garment in black dye. This transforms the appearance of the denim, creating a middle ground between indigo and black that will fade with a blue-tinged hue.