Friend Holder Spare Cigarette Filter Cartridge (20-Pack)

Pros: It really does filter out a lot of the tar that would otherwise enter your mouth and lungs.

Cons: You have to take harder drags for the same amount of smoke. I also think it's made of PVC, which isn't exactly a good compound to use for a cigarette filter... since it leaches phthalates, and releases HCl upon combustion

Other: I don't know. I got them, so I might as well use them. However, I won't be buying these again.

Pros: good filters are not the best for health but help reduce chemical. The more you buy cheap and low price more, I will continue buying, They help a little to the health of smokers, of acceptable quality and disposable

Cons: can reach the shipping box a bit battered but nothing to bother, I have no problem, are very good to meet what works

Other: work very well good product, serve their purpose I will continue buying, They help a little to the health of smokers, of acceptable quality and disposable