The second concern is it looks like it will stretch out over time and be less ...
As other people have mentioned, they do have a strong chemical smell when first taken out of the package, takes a few days for the smell to go away. It seems to work for me, my wife says I'm snoring less.  My wife has long hair and she can't keep this strap in place.  My first concern about this product is that it leaves blue marks on my bed linens; body heat causes this?  The second concern is it looks like it will stretch out over time and be less effective.  My last concern is that the Velcro sits right in the top of the head where lots of men start balding (including me); will this aggravate and maybe accelerate male pattern balding on the crown of the head??!!?
Rating: 3 stars