I wonder if they're Gildan T-Shirts?

I'm sorry, but if your company now sells WBW¹ T-shirts, you can't claim "to promote visibility, unity and self esteem amongst Lesbian, Gay, Bisexual, and Trans-gendered persons."

¹ WBW = Women Born Women (by which the speakers usually mean Cis women).

Edit: the original site in question has removed the T-shirt design. Good for them!