I had two solo loops, specifically the ones from Apple. The first one broke just shy of one year. The second one also broke just shy of one year.
After that, I bought the knock-offs from Amazon. Those also broke a little after one year.
Point of this story is that these will break with normal usage around the 1 year mark, compared to the Apple Watch band from my Apple Watch 2 which is still going strong.
OTOH if you use several, keep them clean and in regular rotation, they can last for years.