SOULWIT Headband Side Cover Slider Outer & Inner for Sony ULT WEAR/WH-ULT900N (WHULT900N) Over-Ear Noise Canceling Bluetooth Headphones, Replacement Head Band Repair Part Accessories Kit - Black

Btw I saw someone post about soulwit within this subreddit, and do some search and found this : https://www.amazon.com/dp/B0F1YF5QXM?lv=shuf&channelId=500&plpRedirect=mhFallback Maybe if you put it on the Ult since the day 1 you purchase it (again maybe) it will help to prevent the hinge from cracking. But we won't know anyway haha.. Well that's if you still want to buy Ult. As for the Sennheiser, AKG and also Audio Technica I only know the wired one. For the wireless one, maybe you want to google it? I saw Soundcore and JBL on the google search for 100ish Wireless Headphone. But again necer owned it so I don't know how it's sound and durability. So I can't help that much.