I just read the thread on the leather Monterey and saw where someone posted about a pleather (what exactly is pleather?) Radian? Where can I find it? My 7 mo is allergic to polyester, right now he's riding in a Marathon with one of the old denim covers that is 100% cotton. The seat is not expired, the cover came off an old Marathon from someone else ( I called britax and was told its OK to use it). I actually have a spare Marathon for when the one he's in expires (in about 14 mos) that has about 2.5 yrs left. I will be replacing these marathons when they expire or he reaches the rf weight limit (33lbs). I have no idea what I will do then because all the car seats I can find are polyester (that's some nasty stuff by the way). A leather Radian sounds real good right about now. Even in Texas in the middle of the summer;-) but what is pleather? Is it polyester made to feel like leather?