Debrazza’s monkeys have grey/black fur all over their bodies. They grow to between 16 and 25 inches. Males are larger than females and weigh up to 17 lbs whereas the females weigh up to 9 lbs. Their heads are round shaped and their faces have an orange crescent on the forehead area, a white muzzle and long, white beard. Their extremities are black including their tails which are longer than the length of their head and body combined. They use these long tails for balance. There are long white stripes on their thighs and rump. Males have a blue scrotum. These monkeys have a vocal sac that inflates, allowing them to make loud calls and have check pouches to carry food while they forage. Their lifespan in the wild is between 20 and 26 years, and in captivity they can live up to 30 years.