100% cotton, sweatshop free (made by www.justshirts.ca). All T-shirts are brown, but there are three ink colours: green, pink, and shiny gold. Available in S, M, L. Cost is $17 (a little pricey but it's because they're sweatshop-free) plus shipping, which is between $2.75 and $8.50 depending on where you live. Payment is via Paypal but since there's a lot shipping options and ink colours it's easier if you just contact me at digits AT digitsmusic DOT com and we'll arrange things.
That's Evangelos Sanctums happily wearing the shirt in Edmonton.