clint eastwood

Hey everyone, i’ve been trying to figure out what this shirt that clint eastwood wears in High Plain’s Drifter is made out of. Any advice on the fabric or anywhere i could find a shirt like this would be fantastic. Thanks for any help offered.

My 3D printed and working Mitch Leary composite pistol from In the Line of Fire. I modelled it up last week and have been working out the mechanics since. The plastic firing pins cracked every time I fired them, so I made new ones from aluminium. Very happy to finally own one of these. So...