Using this upgrade kit is easy. First, gently remove the old hair parts from your SH Figuarts Kamen Rider Ex - Aid Muteki Gamer figure. Then, carefully attach the new flexible hair parts. For the eye stickers, just peel them off and stick them on the right place on the figure's face. And when it comes to the neck joint, replace the old one with the new one slowly. When handling the parts, be gentle to avoid any damage. To keep the kit in good condition, store it in a cool and dry place away from direct sunlight. Don't expose it to extreme temperatures or rough handling, as this could affect the flexibility of the hair parts and the quality of the eye stickers.