No! Try "sleeve-less T-shirts", for starters.
It's the sleeves that make 'em "T" shirts, right?
If they're sleeve-less, shouldn't we call 'em "I-shirts" instead?
Well, that makes no sense. A T-shirt is called a "T-shirt" because when you lay it out flat, it is in the shape of a "T".
A similar sleeveless shirt would be more like an "I-shirt", don'tcha think?