I always had a hard time finding a pick who don't slide around. But then i found pickboy pos-a-grip picks.
the through-hole pattern design makes sure you always have the perfect grip. - No more sliding around or dropping picks.
also, these picks outlast most other picks by quite a while, the reason is the carbon/nylon material they are made of. it's heavy-duty.
I've used pickboy pos-a-grip picks exclusively for the last few years (im not sponsered in any way, shape or form), and i don't see myself using any other picks in foreseeable future.
And I would recommend these picks to anyone...