A "heritage" product is simply a reproduction or continuation of a classic product that remains in production in the modern-day due to its inherent virtues. Let's take a look.
You may have seen some leather boots with what's called a "half-lug sole," often enough - at least with quality examples - a Vibram product, and at that the Mini Vibram sole. It's a very common sole style on work boots and on some casual shoes as well.