Keter T-Shirt Tzitzis are for boys. These have a round neck and one hole where the tzitzis string goes through the fabric. These beged (undershirt) is made from 100% cotton and is soft just like an undershirt. These seem to run small.
I'm giving a little unasked for general advice, check all tzitzis to be sure there's no defect in the knots.
Any order placed after 12:45pm on 4/19/24 is not guaranteed to ship until after Pesach. We will not be processing any orders over Pesach.