Portfolio filtering

Hi guys,

I am after a suggestion to solve a problem on one of my clients website. Client link is below in private content.

For instance, if you choose the filter option ‘ring binder’ on the product listings filter, then click an item and enter the detailed product page there isn’t a button to take you back to that ring binder listing.

I know you can hit the back button on the browser however can we make it more user friendly by having button that will take you back to that filter ie only display the ‘ring binders’?

Also if you do choose ring binders then enter an items product detailed page I think you should be able to click the left & right arrows to take you through just the selected ring binders. Currently when you hit the side arrows it takes you through the entire product listing.

What do you suggest is the best way to achieve the above?

Many Thanks