Ergonomic ThimblePrym's ergonomic thimble is the next generation of thimble. Due to the ergonomic fit, the thimbles fit extraordinarily well on the fingers, the slits in the side and on the back prevent the finger from sweating during prolonged use, and it even comes in four different sizes, so you can certainly find the perfect size for your fingers. The thimble is made from soft plastic and with a hard plastic disc in front, which helps to push the needle through