Iron Heart is obsessive about every area of its production, from the choice of the long staple cotton used to make its signature 21 oz heavy denim, to the leather patch that puts the finishing touch to each pair of Iron Heart jeans. Renowned for their medium and heavy weight denim, all garments have exemplary construction details - from Iron Heart jeans to classic work shirts. The Ultra Heavy flannels released every season are eagerly anticipated by many devotees. They are shuttle loomed with super soft Aspero cotton grown in the Peruvian wild. No other cotton can provide the same ‘hand’, so no other cotton is accepted for the construction of these legendary shirts. It is this level of commitment to quality that sets Iron Heart apart from so many pretenders to the heavyweight crown.