I think "continuativo" could possibly be translated by "ongoing" here. It's probably an item of clothing within the collection that is continuing to be sold. Maybe other items are deleted or new ones added, but this one is, well, ongoing.

Another sense of "continuativo" is "permanent", so it could be a particular item that is there to stay. But "ongoing product" should meet your needs, although without more context it's hard to know exactly how the phrase is being used. But I hope this has been of some assistance.