Iron Heart 18oz Vintage Selvage CPO Denim Shirt Iron Heart western style CPO shirt, built using 18oz vintage indigo Japanese selvage denim. Finished with twill lined cuffs, collar stand, and side pockets. The oversized Iron Heart Logo’d copper snap buttons really make these one stand out. These shirts have been a classic favorite yet iconic denim shirt from Iron Heart. Let this shirt add some extra miles on your denim journey and get ready to be a witness of the some great fades this denim will give. Cheers!