[Her confusion is met with his for a moment, but when she repeats the term, he understands the source.]

Oh. They're thin strips of cloth with something like clips on each end, basically. [He motions with his hands as he speaks, from his waist up.] They go over your shoulders and hold onto the front and back of pants to keep them up. They'll probably have some, looking at the selection...

[He strides out to look—he didn't see any of the belts he's used to, but accessory sections are generally easy to find, and he'll demonstrate for her when he finds them. He might be hesitant about standing out in terms of fashion, but he doesn't feel shy about trying on outer garments in the open.]