I've tried many styles, shapes and materials. My favorite I found recently is a 40mm inner diameter 6mm wide stainless steel ring. I can wear it all day for multiple days. I started with the thing rings, worked towards wide sickness bands, and even the 3 holed ones. Some are good for short term while others are just terrible. It may take some time, but you'll find one that work. Go with the multi pack to get many sizes and try different combinations. Good luck