Being a guy, I don't even know where or how to ask this question but I'll try

I took my daughter out for an over nighter and she loved it, her pack weight was comfortable, her pack was comfy, but she complained her shoulders were sore at the end of the trip, We figured it was her Bra strap digging into her neck from the pressure of the shoulder strap, what do you girls do.

Shes busty and a very tall thin build