8 REASONS TO PROTECT YOUR CARDS USING CARD SLEEVES If you are not sure how to keep your trading cards secure and in a good condition, using trading card protective cases will ensure to keep these cards safe from moisture, dust, and dirt. You can easily buy them from trading card stores. YOUR OILY SKIN YOUR CARDS ARE USEFUL MASH SHUFFLING IS EASIER OTHERS WILL BE GENTLER ON YOUR CARDS FOOD AND DRINK CAN DESTROY YOUR CARDS CARD SLEEVES MAKE YOUR CARDS FEEL BETTER YOUR CARDS WOULD NOT GET BENT OR SCRATCHED HUMIDITY OR MOISTURE CAN DAMAGE YOUR CARDS