It seems the size is little small. The large size is AU$ 136.94 + $15.83 and only has 2 left.
CamelCamelCamel.
It is a glass, so compare with the headphones, the weight and space are less. The initial price is around $300. If you love to try some new technology, the current price could be a good deal.
Just remember, our eyes are literally designed to see blue light best of all; it takes the least focusing power to see it (we are not nocturnal).
You can cause some serious muscle imbalances if you filter blue light too often, or for too long, as the cones take preference over the rods in your eyes.
Blue light filtering can be 'nice' if you've over-stressed your eyes, and the usual muscles are tired, but you don't want it often.
What people mistake for 'better' or 'more comfortable' is in fact, simply 'different'; and you'd feel the same relief (though, it's not practical) by greatly changing your viewing distance.
It's similar to how people who wear sunglasses too often, don't get natural crosslinking occuring within the cornea, and increase risk of astigmatism as they age. (KC patient speaking, right here)
TLDR, we're not nocturnal, and the 'most relaxing' type of light for our ocular system, is blue light.
If your eyes are physically muscle strained from focusing too close, ANY change is a relief (and Blue filtering can achieve that) but don't make a habit out of it.
Everything in moderation.
“More Than 5 Hours of Battery Life
With this much mileage on a single charge, it'll never run out during long gaming sessions. When folded up and not in use, its conserves power by shutting off automatically.“
I regularly wear my blue light glasses and headphones for the entire work day. My embarrassingly long gaming sessions also generally go well over five hours. Most of the decent Bluetooth headphones I’ve bought in the last few years will do a full day at work split between hands free calls and filtering out mu coworker’s views on immigration. 5 hours doesn’t feel like a selling point so much as maybe something you could live with if you had to…