This is a high-resolution mockup PSD of old, crumpled t-shirts where you can easily replace your artwork on the tshirt using smart object layer "YOUR ART HERE".
The t-shirt mockups come in 2 variations: plain and stripes. They look really crumpled and wornout.
The artwork on the tshirts is grungy and a little displaced to make it part of the oldness. Just double-click the smart-object layer "YOUR ART HERE" and add your logo or artwork and save the .PSB file. The result will be a grungy artwork on the tshirt. You can even change the color of the tshirt using the Photo Filter layer option.