Troy Lee's new A2 liner for 2018 has more liner material added for a higher degree of comfort. Additional material added to the lower left and right side strips, as well as additional strips added to center left and center right. If you prefer the previous liner in the A2, with less material, no problem. TLD added the new strips with a perforated trim so you can easily remove the newly added strips. Made of premium wicking foam inside and with X-static pure silver anti-microbial fibers.