I love the NDH20, they are so comfortable, not to speak of the sound quality! But we are talking about the ear pads here. They are comfortable. Maybe not thought for a too warm weather, because the glued parts can "de-glue". But hey, I got to buy the new pads, and they are, not so intuitive to mount, but once you know how to do it (and it's not so difficult) it's pretty straight forward.
So, now that I live in better climate, I expect them to endure more. They are soooo comfortable!