A while back we were schooled on "Link Silos" a reputable SEO source.... and one suggestion was to create links from our product pages (bottom of link silo), back up to it's higher category page. So for example...
Home > Tools > Hair Dryers > "Product"
On the subject product... we chose to link back to "Hair Dryers" and then "Andis" (that product's brand page.
You can see this at the below product page. We added the links below "Related Categories" in the product description.
http://www.beautystoponline.com/Andis-Colorwaves-Tourmaline-Hair-Dryer-Blue-Green-p/an1dry0295.htm
We are now thinking this may be just too much as there is already a "bread crumb" trail at the top of the product page. These are in essence links back up to higher categories.
Any input on these types of links would be appreciated.. Thanks!