Karate Gear is used by SpongeBob and Sandy in all episodes involving karate (excluding "Karate Island"). Karate Gear consists of two items: a horizontal helmet (only for SpongeBob) and big gloves. SpongeBob's is red and Sandy's is green.
The gear is used to protect them.
SpongeBob's karate gear is red-colored. His gear helmet has a ladybug design on the left-side hole, as seen in "I'm With Stupid." His gloves are big. In the Nicktoons Unite! games only his gloves appear.
Sandy's karate gear is green-colored. She has no helmet, as she has her own air helmet. Just like SpongeBob's gloves, hers are also big.