What is the waist part of this shirt called?

I know it's a mesh top, but I talking about the stomach area with the vertical patterns. Stripes? Panels?  The bust part is sewed into the top, not a crop/bralette.

This is a very old top from Gina Tricot and I'm trying to find catalogue pics of similar shirts (think polyvore collage before that website were changed into ssense), I only find completely sheer and sheer sleeves.

Please no "sl*t"/body-shaming, I'm asking about the pattern, not whether is too "provocative" or "ugly". My style is alternative and I'm not a teeanger.