product return page

Hi all im building an online shop and just had a quick question, when you click on a product and it takes you to that product there is a tab on the right there is a “back to” button but instead of taking me back to the previous page, it takes me to my “products” page of that certain category.

the pages i have set up have custom sidebars, but once you press the “back to” button the category page is setup with default settings and not my sidebars.

how do i make this button redirect back to the previous page?

im using virtue them

thanks