Hello World
If "solid" refers to the thickness and "girlzip" is a misspelling of a brand or technical spec, you might be looking for heavyweight cardstock or solid bleached sulfate (SBS) board used in packaging.
To make sure I'm giving you the right info, could you tell me a bit more about what this paper is used for? For example, is it for , crafting , or perhaps industrial packaging ? Call girlzip
It's possible this is a niche product name or a mishearing of a term like "Kraft paper" or a specific "Gsm" (paper weight) rating. If "solid" refers to the thickness and "girlzip"