why do some cigarettes have holes in the filter

why do some cigarettes have holes in the filter Bought this on holiday UK (Southern England), but they these really odd filters? : r/Cigarettes Amazon.com: EFFICIENT Cigarette Filter Tips

Name: why do some cigarettes have holes in the filter Bought this on holiday UK (Southern England), but they these really odd filters? : r/Cigarettes Amazon.com: EFFICIENT Cigarette Filter Tips
Brand: www.cci-tissemsilt.dz
SKU: 93706716867
Price: 25.81 USD
Availability: InStock
Rating: 4.1143 (19 reviews)

SKU: 93706716867

4.1

USD25.81 USD58.81

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Description

"[They] are at a low moment right now

Most markets have a stick count of 20 for all three main styles

This is not negotiable but the remaining 70% of those panels, plus the sides, the inside lid, and the inner tray, remain fully available for brand design