You can use the module to filter the product by attribute name and attribute text (Filled in in the product profile)
You can put each filter separately or both together - different archives

For example, there is a product with the attribute :
Weight: 15 grams
For other products:
Weight: 15 kg

When filtering 15 the result is given for both products where the value 15 is assigned

You can view it on Demo
demo/demo

The module does not replace engine files - it works on Oc mode
Installation is simple:

Download the file install the modifier via the modifier installer or upload the xml file to the /system folder and rename it to name.ocmod.xml

Update ocmod modifiers

Go to the product profile

[*]Rejoice

The module is available on all versions of Opencart/Ocstore 2.x-3.0