Generally a quilted nylon type is used in the barn. The waterproof canvas-type with wool lining is one of the traditional turnout rugs as it is weatherproof and durable, but is very heavy. Blankets must be cleaned at least twice during the winter by washing in cold water with a mild soap. Dry cleaning solvents will destroy waterproofing and can shrink the bindings. Blanketed horses must be meticulously groomed on a regular basis to minimize rubbing and rolling.
Horses are notorious for inflicting damages to their blankets.
Some exterior shells simply crack in extreme cold. Blanket repair is just a fact of ownership. Proper blanket fit is paramount. Blankets that are too small can cause rub marks and sore spots on the withers, shoulder, chest, and hips. Extra large blankets have the reputation of slipping and twisting, possibly upside down which can cause the horse to become dangerously tangled.