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What is the HAIX® AF System?

The AF (Ankle Flex) System is made of elastic cloth that is built into the inside of the boot, to secure your ankle and foot down and back into the cup of the boot's heel. It gives a slip-on boot the security and feel of a zip-up boot, and reduces the likelihood of blisters forming on the heel from rubbing. It also provides better ankle support while allowing more freedom of movement when operating machinery or bending down.