Please Be Aware: AErovivo Air Filter is foldable design and requires proper unfolding before use. AErovivo's 6 refills are Not 6 regular filters, but rather six filter paper designed for our reusable foldable frame Smart & Innovative Design: Say goodbye to the single-use cardboard filters! Our reusable HVAC filter boasts a strong foldable abs frame that's made to last. Just clean it when replace, and switch out the filter paper it's that simple. Note: The filter frame is foldable, so the package is smaller. The product will expand to the correct size once unfolded. Don't be surprised by the package size Economical Bundle: With one purchase, you'll receive 6 packs refills (Not 6 regular Filters), providing up to 2 years of effective filtration when used with our reusable frame.