I have never been one to let my helmet or helmet pads actually touch my head. I have never seen a bacteria test on a helmet, but if I saw one I am sure it would be pretty scary. When it is warm out I first put on a bandanna and then my helmet, and in the winter I put on an appropriate stocking hat that will fit comfortably under my helmet.
Recently I received an email from the folks who make sweathawg products.
The skullcap is by far my favorite, you can see I look quite happy wearing it.
As far as the absorption claim, I am not one who sweats excessively so I decided to run my own highly unscientific test. I have two equal measuring glasses and I decided to pour an equal amount of water into both - one with the sweathawg skullcap and the other with a bandanna. I started by pouring in one cup of water.
I then held them up and let them drip until the dripping stopped. With one cup of water there did not seem to be much difference, although the sweathawg did seem to retain a bit more water (bandanna left, sweathawg right).
In a way, I don't know if it is a fair comparison because the sweathawg has much less surface area than the bandanna as you can see here.
Thus the absorbsion claim is probably valid, but I am not going to cut the products into equal size samples to compare =)
Overall the sweathawg products are great. They are comfortable, they dry quickly, and most importantly they keep my helmet from actually touching my head. I give them a five zip tie rating (out of a possible 5). Oh yeah, and they are made in Oregon - my home state.