Hi people,
I'm a beginner with K2, and I'm building a simple shoes catalogue.

My big problem is that I have primary categories (brand or kind) on which I can "get" product based another criterion (3 different seasons).
I've installed additional categories plugin, but I can obtain a selection of all items of categories that I choose.
I would like to have just items present in first and second category.

I think to be so far to the solution, so any kind of help would be appreciated! ^_^
I can use categories, tags, or buy extensions... but I would be sure to do the right thing and UNDERSTAND before.

Thank you
Tru

You should look for an extension at the JED or getk2.org/extend
There are some filtering extension and you should check also filtering by extrafields.

Thank you for answering...
I suppose my request is so usual, I meant you or other users could address me to the best solution.

@Adriiano

There is no "right" way to do this. K2 gives you categories and tags. If these don't fit your needs you might need to look for an extension for filtering. Also keep in mind that you can always fetch items from multiple categories using menu links.