What if I just want to enable multiple selection on the variant product ? e.g Select both (Front-Door-Window) AND (Rear-Door-Windows) Or could be any combination as picture illustrate below.  Thanks  

Hi Paul,Thank you so much for the suggestion, I had looked into it already and try the demo and it seem like it is not what it want it. 

Hi,Dawn theme only allow dropdown box and button.Default dawn theme:  I need help to implement check box for theme dawn that can allow me to select multiple item in one product. Thanks.