9oz Cotton Linen Work Shirt - Black IHSH-414-BLKIHSH 414 BLK Iron Heart's classic work shirt, constructed from a 9oz cotton linen fabric. Woven with a traditional left hand twill, the 90% cotton 10% linen blend creates a softer, more breathable cloth while maintaining the rugged characteristics expected of an Iron Heart fabric. This results in a hardwearing yet comfortable shirt that provides excellent ventilation throughout the warmer seasons. With features including button fastenings, a chest