The Fox Titan Race Elbow Guard provides hard-shell protection for your elbow and forearm with added upper arm protection for a no-slip fit. Fox even added silicone print to the liner for an even more secure fit, so you can forget about constantly adjusting your annoying elbow guards while you ride.
These are pretty basic but do the job. I found the small/medium option pretty tight. I'm about 5'9" 180 LBS. and I had to swap out for the L/XL. The top of my forearm near my elbow is about 14 inches in circumference. They aren't super low profile but as long as you aren't trying to fit them under anything they're great. I've taken a few spills on them and they sure made a difference.
The small/medium was way to tight and ultra restrictive. The large was too loose. Didn't fit very well and it wants to cover more of my forearm and not my elbow. I just use the veggie pads from six six one.