Celebrate your unwavering Cal Poly Mustangs spirit with the Men's Champion Green Cal Poly Mustangs Est. Date Jersey T-Shirt. Crafted from durable cotton jersey, this tee features double-needle stitching and a comfortable ribbed collar. The embroidered Cal Poly Mustangs logo and printed graphics proudly showcase your allegiance, making it the perfect way to support the Mustangs on and off the field.