I actually have all three headband types; Shadow on my V-80, White/Silver on my M-100, and Matte Black on my XS. The V-80 is the oldest one I have, 5 years, and the headband has withstood the most abuse out of the three. I didn't like carrying the case for my V-80 and ending up losing it anyway, so I made it a habit to just toss them into my bag when I was out. For the three years that I used them daily, they barely show any wear and tear outside of some slight color fading and a couple of small scuffs which they probably got from rubbing up against spiral notebooks and nunchakus in my backpack.
I made the mistake of treating my White/Silver M-100 the same way. I didn't use the case and would just toss them into my bag. After 2 years, the headband started to crack and peel and it got so bad that I now have my entire headband duct taped to prevent further deterioration. The Matte Black headband on the XS is made of a similar(the same?) material as on the White/Silver M-100, so I baby them and always use a case. It's been an year and half, and no signs of damage yet.
I think the suede material is the most durable by far, and if you go the extra mile of wearing a hat to prevent sweat absorption and use the case whenever you travel with them you should be fine.
Thanks for your response!
I find your reply very interesting so thank you for sharing your experience with the different models. I'll be sure to have them in the hardshell case when travelling and to be "capped" when using them live, so I guess i'll be doing all I can to maintain them. Sorry to hear of the damage on the White/Silver model (the material used on this model is the same for the Matte Black model)!