You can mockup using the template "Tshirt V.2 - Bundle". With a high resolution of 300 DPI, simple colour changes, and straightforward application of your artwork to a smart object layer. PSD file type (minimum cc2014).
Look at front 1 and back 1
Simple to use design
Simple colour customization
Pockets 1 and 2 have coloured stripes (small and large lines).
The Tshirt V.2 mockup fits your project well.
Thanks a lot!
Learn How to Batch Replace Smart Objects automatically.