I purchased the slim imperium loop bands in two colors. They have a lifetime warranty so I felt reassured. Within months they had stretched out to the point that the watch would swirl around and didn’t maintain contact with my wrist (required password, didn’t share messages, etc). I contacted the company and they told me to wash in hot to shrink it, but that only lasted a week. I submitted a warranty claim and paid my $8 shipping, but noticed they now have a band that can be tightened - likely in response to significant warranty claims for stretching. I was not allowed to pay the difference to upgrade so every few months I’ll need to pay $8 shipping to replace the defective bands. Gotta say that if I have to buy new bands, I’ll look at other brands because allowing me to pay for the upgrade was a good compromise in my opinion and they didn’t agree. Three stars because they look great until they stretch out.