Halo headbands have a patented sweat block technology in which the water-tight seal directs sweat away from the eyes. There's also a non-slip grip surface to keep the headband in place. They are made from a Dryline fabric which aides in rapid evaporation and the band will not lose it's shape or form. My favorite thing about these headbands, since I'm a pretty bad germophobe, they have "antimicrobial odor-fighting technology." In short, there is control over the growth of odor-causing bacteria generated when you sweat so you don't have to worry about your headband stanking up the joint. The headbands are also machine washable, but I've been hand washing mine in the shower after I work out.
As for how they work...like a champ. This was probably the sturdiest (for lack of better term) headband I've ever worn. The fit was really comfortable, too and I think it's going to be perfect for under my bike helmet this summer. Both of these styles go for a measly $12.95 which is definitely a fair and reasonable price for the product. Halo has a ton of different products from hair bands to anti-freeze headbands which cover your ears. They also have bandanas, skull caps, visors and a lot more. I definitely suggest you check out their site. I'm going to have to go ahead and give Halo 10 biscuits.
