Which cat litter is truly low-dust?

No clay litter is genuinely dust-free despite marketing claims — multiple r/CatAdvice threads call out the '99% dust-free' label on Fresh Step as overstated. Dr. Elsey's Ultra gets the most credible low-dust reputation among clay options in specialist communities, while silica crystal and corn-based litters tend to produce less airborne dust at the cost of other tradeoffs.