Few materials can match horsehair when it comes to making a bed. Horsehair comes with its own, extremely effective, built-in ventilation system.
Moisture passes through the hollow strands so quickly that if you wet horsehair with water
and give it a shake, it dries straight away. So horses have their own air conditioning system that keeps them dry in the heat of summer. This quick-drying property is perfect for a mattress because body temperatures often transform into moisture in the form of perspiration.