Hmm, if she thinks the Hanes Beefy tees (5180) and the Gildan 6.1 are too thin, I'm not sure what she's looking for.
The Hanes Beefy Tee is a pretty thick t-shirt.
You may want to ask her to bring you a t-shirt that she likes that has the thickness she prefers so you can try to match it without playing a guessing game with her
I think the Anvil 6.1 will be similar to the Gildan 6.1.
For thicker t-shirts that that, you'd probably need to look at urban t-shirts like ProClubInc.com, CityLabUsa.com and Luxe-T.com
The Hanes Beefy Tee is a pretty thick t-shirt.
You may want to ask her to bring you a t-shirt that she likes that has the thickness she prefers so you can try to match it without playing a guessing game with her
I think the Anvil 6.1 will be similar to the Gildan 6.1.
For thicker t-shirts that that, you'd probably need to look at urban t-shirts like ProClubInc.com, CityLabUsa.com and Luxe-T.com