This came about sometime around 2008-2009, and wasn't fully rolled out until Winston and American Spirits Caved sometime around 2011. The process involves treating the filters with Scotchgard, there are no adulterants added to the tobacco itself.

In theory RYO should be OK in that regard, particularly if you use no filters, or natural cotton ones.

Edit : after looking into it further, apparently there are also modifications to the paper tube causing "speed bumps" to the burn by using thicker sections of non-porous paper.

This came about sometime around 2008-2009, and wasn't fully rolled out until Winston and American Spirits Caved sometime around 2011. The process involves treating the filters with Scotchgard, there are no adulterants added to the tobacco itself.

In theory RYO should be OK in that regard, particularly if you use no filters, or natural cotton ones.