Heat transfer numbers for jerseys

product description: SOFT FABRICS | Our shirts are a ringspun, 30/1 fine jersey knit on 90% USA-grown cotton (10% polyester). If you don't speak t-shirt geek, that means they are soft and smooth with a high thread-count, tight knit made out of fuzzy plants grown by American farmers. These are mid-weight shirts - a bit lighter than your mass-market, thick gym class t-shirts, but substantial / not see-through. It's a nice balance between comfort and durabilitySleeve Length: Sleeveless,Availabe Size: S-XLSleeveless , breathable, quick drySide inserts and trim are sewn in