1. The instep Velcro strap is more durable than regular Velcro and can be removed and reapplied 5,000 times, providing greater stability. It's easy to put on and take off, preventing slipping off.
2. The heel has a small, anti-friction cushion design for a comfortable, supportive feel.
3. The STR material sole is stable and comfortable, with a flexible, flexing design in the forefoot.