I'm selling two brand new pairs because I only used one out of the pack of three. The edges are cut, but they don't fray, and I think they're seamless and easy to wear. I think they probably have a crotch lining, so it might be possible to wear them without underwear, but personally, I feel more secure wearing them with something underneath. The fabric is smooth and feels slightly cool to the touch (similar to Uniqlo's Airism, etc.).