If you roll over the Zoom image of this product, you'll notice a lengthwise bumpy lift along the middle of the hendband.  That's the inseam, which is similar to the hem that you'll see on sweatpants, undershirts, and other knit products, but this inseam is pronouncedly raised and uncomfortable.  I have a small head, which measures twenty two inches, and I suspect that these bands will be more uncomfortable for anyone with a larger head.  The bands' circumference is about fourteen inches.

My old headbands have the seam along the side, not the length, and they are not visible because they're neatly sewn inside the band.  Because I'm not overly concerned about appearance, I remedied the problem by refolding the headband to position the seam along the edge of the band instead of the middle, where it is now totally visible.  If you like things to match, this solution may not be right for you because the seams are in either white or black.  If it were not for the unsightly and uncomfortable seam, I'd give the product four stars.  It will never get five because I doubt it will soak up any sweat, since it's synthetic.  I use it for the opposite purpose: to keep my forehead warm in an apartment where I cannot regulate the temperature well, except high and low, because the cool air is pumped in from a central facility.