Disclaimer: I am not a doctor; I am a handyman who has some relevant and hopefully helpful advice. This should not equate with competent medical advice nor is out to condemn or defame any material or manufacturer. In fact I am a proponent of the products as they promote safety in the workplace as well as assisting in keeping marriage vows. I will update this article as I find out more on this subject.
The bands I bought were NOT Qalo, but some off brand I can't remember. They are made of silicone and have garnered many compliments, especially from women (which is why I'm glad I have them because I want them to know I'm married).
They've performed as advertised and have taken their share of pinches, scuffs and scrapes with only a minor blemish. I can't say that with any other material I've tried including titanium, stainless steel or gold.
However, there is a bit of caution with these rings from my limited experience with same. You might want to take it off from time to time, clean it and your hand with a good antibacterial soap. Walgreens has some soap for those who wear artificial limbs that will kill bacteria for six hours. Since my hands sweat and get into some very dirty places, including washers and dish machines, I was getting this gunk under the ring and it was beginning to stink and get infected.
I've been dousing my finger with Neosporin and have stopped wearing it altogether. If I do wear another ring again, I will buy a Qalo and get it one size bigger as to allow my finger to 'breathe' plus the soap used daily or more depending on the day I'm having.
Again, I'm not bashing the use of silicone weddings rings as they are a great idea who time has long been overdue. You should take some cautions to prevent an infection that may cost you a finger, or a hand which is what these rings when worn properly are made to prevent.