Wow this is funny. My DS7 only wears pull on pants too. He is very slim and I tried jeans but he could litterally slide them up/down (the levi slims) to avoid unbuttoning so i gave up on him when he was 5.
OP we wear athletic pants. Mostly Nike and Adidas because mostly they have the most narrow waist i can find. And we dont like crunchy sounding stiff ones. I buy the Nike and Adidas at Kohls or Sports Authority. Russel Athletic has some similar pairs too. And when i roll out the shorts its Nike and Adidas as well.
Good luck!!
OP we wear athletic pants. Mostly Nike and Adidas because mostly they have the most narrow waist i can find. And we dont like crunchy sounding stiff ones. I buy the Nike and Adidas at Kohls or Sports Authority. Russel Athletic has some similar pairs too. And when i roll out the shorts its Nike and Adidas as well.
Good luck!!