90% cotton, 10% poly
I've noticed quite a few Heather type shirts out and about and on the Television shows.
I ordered some up and they look really nice by themselves but they did need a little extra something for some pizazz
So I applied the CALGUNS.NET text to the front and the large logo to the back and voila, they came out pretty sharp.
In clothing, heather refers to interwoven yarns of mixed colors producing flecks of an alternate color. It is typically used to mix multiple shades of grey or grey with another color to produce a muted shade (e.g., heather green), but any two colors can be mixed, including bright colors.
Sometime also referred to as a frosting color.
Simply put its:
Cross-dyed shades (two colors in one fabric)