How to form breadcrumbs (Breadcrumbs) if one product is in several categories?

Question

Search Engine Optimization

There is a category tree:

1. men
   
   1. thermal underwear
      
   
   
   
2. Women
   
   1. thermal underwear
      
   
   
   

There are products with thermal underwear that are suitable for both men and women, that is, such products will be displayed in all 4 categories, how to form breadcrumbs? It begs the decision to start a category something like a unisex, and somehow sort it out in this way, but I honestly don’t want to admit it, maybe someone has come across this, tell me how you solved such problems. Another option, I think you can buy the same product twice - separately for men and separately for women, but this is a double ...

Answer 1

For the first category, the breadcrumbs would be: site > men > thermal underwear > product_1
For the second category, the breadcrumbs would be: site > women > thermal underwear > product_1
All breadcrumb items except the last one are links. The product page is the only one and has an address, for example, site.com/products/product_1
Most CMS allow you to place the same product in dozens of different categories.

Answer 2

The most correct is to create a unisex section, because. in any case, such a product should have only one URL, and all others should redirect to it.
Therefore, to somehow make a crumb so that it is displayed one for one category (Men) and the other for another (Woman) with proper SEO (when a product in different categories is available only at one URL) is simply impossible technically.
So you have to make a unisex category.