Two big things:
● The perforated natural leather lining inside the boots give the boot good durability and breathability, no cheap textiles inside. It also gives it great comfort!
● Patented Sealing-Edge bonding system. Most other boot on the market use glue or stitching, which are prone to failure when exposes to continous heating-cycles. Since the Asphalt Pro is pressurized together, it doesn't melt apart from the asphalt's heat.