Karate gear is a type of protective equipment used by SpongeBob and Sandy in episodes that feature the sport of karate. It consists of two items: a horizontal helmet that is only for SpongeBob (and once Patrick) and big gloves.
SpongeBob's karate gear is red in color. His gear helmet has a ladybug design on the left-side hole, as seen in "I'm with Stupid."
Sandy's karate gear is usually green in color. However, in the episodes "Waiting" and "Shopping List," she wears red gear, and in the episode "Sandy's Nutmare," she has pink karate gear. She doesn't wear a helmet, as she has her air helmet.
Patrick's karate gear is just like SpongeBob's, except it is blue in color instead of red, and his helmet is a little smaller than his. His gear is just seen in "Karate Star."