I recently had an accident that limited my ability to grip a pick, so I figured I'd try a thumb pick, after visiting a local music store and not being satisfied with the options available I ordered these.
These picks are great quality, a little tight to start off with but some boiling water soon fixed that, Hard to comment on the durability of them as haven't had them long, but through some extended use over the passed days they sure no signs of wear, so they give me no reason to doubt the durability.
Very happy with them.