| Kevlar Motorcycle Underwear/Outerwear
The main problem is that Kevlar by itself is grabby, i.e. it doesn't slide well. You'll notice that Kevlar is usually used attached to some kind of supporting structure such as leather to keep it in place on your body. It shouldn’t be used alone.
As an example: I ran across a ‘95 test of motorcycle gloves by Performance Bike where they tested gloves using a weighted silicon rubber hand and a 80 grade sanding belt moving at 50 mph. They tested Kevlar work gloves and found excellent abrasion resistance. They lasted an equivalent of 720 feet before developing holes! They concluded that this would be the ideal glove except for the fact that they don't slide well. In fact, the gloved hand grabbed on the belt and was ripped right off the mounting jig during the test.
They concluded that a Kevlar glove that has no wrist restraint is likely to come off in a crash. So, one solution is to wear Kevlar gloves under leather gloves that have a wrist restraint and longer cuffs. After the leather gloves hole-thru, the Kevlar armor will protect your hands and stay on because of the over-glove wrist restraint.
The same issues would apply for Kevlar underwear or outerwear. Without something to keep it in position it will grab the road surface and likely ride up on you till your skin is exposed. Another concern is that, because it grabs, it’ll send you tumbling down the road instead of sliding. Not good.  |