I've been wearing negative ion wristbands from other suppliers for years - they help me sleep. I like the kind you just leave on and forget about but they tend to look dull and boring and not terribly attractive. That was until I discovered Trion-Z. I bought the duo loop one and I must say I'm delighted with the look of it. It's fully silicone so you can still pull it on and off very easily and wear it 24/7, but the design far outweighs any of the bands by other manufacturers. It actually looks very like a wristwatch. I bought the black and grey, which will go with everything.