These were bought for my son, to help him with his musical requirements. He has used them before and been very pleased, so going for another batch was a no-brainer.
These are the standard, extra-grip picks, which will give a slightly different tone from the carbon fiber type. There is a standard version available from Thomann.
I believe there is a version which does not have the extra "grip" - don't buy those, buy these, unless you have a good reason to do otherwise.
I played guitar for nearly thirty years, before I switched to bass, and I was always dropping my pick. This design gives the player a better chance of holding onto his plectrum, particularly if his hands are cold.
I still play guitar on recordings, sometimes, and I find that these stay in the hand automatically.
The grips will wear down in time! But I don't consider this a downside, simply because it's to be expected. My son will generally select a new, or nearly new pick for a gig, or a recording session. The life of the grip could possibly be extended by gently scrubbing the pick with a wet nailbrush because dead skin, trapped inside the grip, will exacerbate wear by reducing the grip available.
They come in batches of six so I guess they should last the average player a few months. As with anything my son uses and likes, I recommend that these are tried,
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