4C hair is a hair type that is tightly coiled with sharp angles and is the tightest and coarsest of all the curl types. The curl pattern of 4C hair is made up of super-tight zigzags that are densely packed. Unlike other hair types, 4C hair does not have a defined curl pattern in its raw state, and curls must be defined by twisting, braiding, or shingling. Some defining qualities of 4C hair include excessive dryness, breakage, knots, and frizzy hair. To care for 4C hair, it is recommended to limit shampooing to once or twice a month and opt for co-washing instead, deep condition the hair at least twice a week, and use a wide-tooth comb to detangle damp hair after prepping with a leave-in conditioner.