Still using a pencil and eraser on your character sheet? Try switching to dry or wet erase markers, and you'll never again rub a hole through the HP block.
These 8 1/2" x 11" plastic sleeves make it easy to track changes to your character during play. You can put two pages of your character sheet into each sleeve (back to back), and use both the front and back of the sleeve.
They work with both dry erase and wet erase markers, and feature a sturdy grommet at the top for easy hanging - which is useful if your GM wants to track initiative on a sleeve, or display important handouts.