I love my Tortex Jazz III picks (the standard white ones) and I was looking for a bigger version of them. I was hoping to find an XL version of the Tortex Jazz III but they apparently don't exist...
Turns out, this "Tortex Flex" material isn't exactly like typical Tortex. It's softer and slightly more flexible. They feel pretty close to a standard Tortex Jazz III once you've gotten used to them, but they wear down a lot faster, especially if you play heavier music with lots of chugging (lol). In which case, this pick will be completely shot after a day, maybe two if you're lucky.
I yet have to find a pick that's better than the Ultex Sharp when it comes to metal...