Thank you guys for the interest and replies.
As DevilDog kindly pointed out, they are made of ABS plastic. The plastic is 100% virgin (highest grade) with a proprietary UV/weather blocker "molded in" as part of the manufacturing process. (If you do some research, the official term for the UV blocker molded in is called a "cap") They are 100 percent made in America starting with the base material stock coming from a mill in the US.
Also as pointed out, we currently only offer the fenders in a regular width, which is only as wide as the OE fender without the OE flare attached.
This does leave the tire sticking out, whether that is a good thing or bad thing is up to you. It has been a very long time coming but we are currently making some progress on a wide fender for those who wish to cover the tires such as the OE flare would, and more coverage optional. The current fenders are not street legal in our home state, and although we drive our personal Jeeps almost daily and have yet to be hassled (knock on wood), we would like the option to be street legal.
For installation, they do require cutting of the OE fender. Basically the front, top, and part of the back edge of the wheel well gets trimmed off and our fenders go over the trimmed area. Here is a quick picture I have handy of a YJ, but the TJ is similar:
We do provide instructions as well as a cutting template, although in reality the cuts do not need to be extremely accurate. If anyone would like to see a copy of the instructions send me your e-mail address and I'll e-mail you a copy.
Thanks,
Mike