Ultra-long haul tours of duty require significant "time in shoe". This increased moisture stress on the shoe accelerates wear and creates temperature instability around the foot. Sky Soles uses breathable poron foams like Ortholite combined with perforated footbeds to allow airflow in and around the foot. This allows humid air to escape the shoe and heat from the foot to access cooler air in hot environments. In cooler environments the breath ability of our footwear provides insulation to colder exterior air.