[jewba]

I have access to one for work stuff. It is just too heavy and uncomfortable for more than 30 min of using it.

[mapontosevenths]

I had to try several different straps and configurations before I found one that worked well for me. I forget what it's called now, but there's one made by a company that makes CPAP machines. That's the one to get. Makes a huge difference.

[wahnfrieden]

Just be careful because one component of it on each side is glued to the fabric and comes apart spontaneously.