The 1000 Mile Fusion Socklet has had an upgrade, the core values are the same, the Fusion Anklet Sock, still combines the comfort and protection that comes from a padded sock with the 1000 Mile Double Layer System for reduced friction and blister protection. The padded zone on the heel which helps to protect the Achilles tendon has been extended around the ankle and we have re-shaped the padding on the toe and ball of foot areas to make it even more comfortable.