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, her's are also big.
Patrick's karate gear is just like SpongeBob's it is just blue. It was only seen in Karate Star. But his helmet is a little smaller.