Dual stage foam: Two different pore sizes create more trapping area for even the smallest dust particles
Flame laminated foam: Both “stages” are not glued, but heat sealed to provide maximum air flow
Reticulated foam: Increases dirt stopping surface area and increase foam strength
Strongest glue seams will withstand harsh solvents and gas (although we can’t understand why you’d want to use them). Pull as hard as you can, foam will rip before the glued seam will
Light color foam easier to spot where the filter oil has covered and where it has not
OEM size for more dirt stopping capability
Handmade
Every square inch of each filter is and inspected for quality
One year warranty
Made in the USA, not a cheap Chinese throw away

Fitment
2003 Honda CRF150F
2004 Honda CRF150F
2005 Honda CRF150F
2006 Honda CRF150F
2007 Honda CRF150F
2008 Honda CRF150F
2009 Honda CRF150F
2012 Honda CRF150F
2013 Honda CRF150F
2014 Honda CRF150F
2015 Honda CRF150F
2016 Honda CRF150F
2017 Honda CRF150F
2003 Honda CRF230F
2004 Honda CRF230F
2005 Honda CRF230F
2006 Honda CRF230F
2007 Honda CRF230F
2008 Honda CRF230F
2009 Honda CRF230F
2012 Honda CRF230F
2013 Honda CRF230F
2014 Honda CRF230F
2015 Honda CRF230F
2016 Honda CRF230F
2017 Honda CRF230F
2019 Honda CRF230F
2010 Honda CRF150F
2011 Honda CRF150F
2010 Honda CRF230F
2011 Honda CRF230F