The material is breathable, stretchy, soft and moves well. With no "leg" to speak of, they don't ride up, and they have an extra amount of "package" area to accommodate. This all equals extremely comfortable! Having purchased David Archy's in the past in size large (I am a 34-35 waist), I purchased these extra large as the other pairs seemed to shrink a tad and were on the tight side around the waste. These however are a tad too big. Hopefully they shrink a bit with some washing, but I am otherwise very happy.