only get a soma everwear if you are real into sliding, otherwise it's not a great tire. They have issues with the sidewall blowing out and are real heavy and don't offer the best puncture protection. But if you slide a lot i would highly recommend them since they last longer than any other tire.
but to answer your question not sure. I have 1 on my bike and 2 replacements hanging on my wall and they say near nothing helpful on them. Made in Japan, inflate to 100-150 psi, 700x23c (they also have 700x26), and some N06 followed by 5 circles each having a different number of dots in them lol.
And the website listed on the tire www.panaracer.com
has no listed info on the everwear.