Our Chest Guards: Durable chest guards for the 21st century! Every fighter knows how vulnerable the collar bone is. Masters even refer to the cavity behind the collar bone as the 'forbidden triangle'. A strike to this sensitive area can render the arm useless or even cause unconsciousness. Leatherona's Competition Chest Guard innovative wide collar and elastic back design provides padding over the "forbidden triangle? and collar bone, without detracting from comfort and freedom of movement. Each chest guard mostly comes in the traditional red and blue reversible colors with white trim.