They were a little thinner than I expected.  Next time I'll get .85.  This work just fine.  I like nylon better than plastic as a general rule.  They don't crack.  The leading edge flexes and works nicely for mandolin type picking.  I like thicker ones because I play bass a lot and they have heavier strings that the super slinky's on my guitar.  This are like Fender light plastic picks, EXCEPT they are gray nylon and won't crack or break.  They are also ribbed and easier to hold and don't slip as readily.