Filter and sort combinations on category pages can generate thousands of near-duplicate URLs that dilute authority and waste crawl budget.
Decide Which Combinations Deserve Indexing
A filter combination with real search demand behind it, like a specific size and color together, may deserve its own indexable page; most others don't.
Use Canonical Tags Consistently
Point low-value filter combinations back to the primary category page rather than letting each one compete for the same rankings.
Block Rather Than Ignore
Where indexing genuinely offers no value, prevent crawling of parameter combinations directly rather than leaving it to chance.
Next step: Use the URL Encoder / Decoder to understand exactly how your filter parameters are being structured.