There is a great new thimble on the market from Clover. It came out this spring and has been featured in magazine articles about best new items.
The tip is dimpled metal with a raised ridge. The main thimble is made from flexible rubber. The package says the scallop design of the rubber keeps your finger cooler by the air flow. It comes in 3 sizes: small, medium and large. The retail price is $11.75.
I am not a thimble wearer but do like the feel of this one. The rubber sides can be used to grip a needle when you need a little extra traction.