If you suffer from plantar fasciitis or PTTD, you will not find a better ankle brace for support and pain relief. The TriLok's patented FootLok strap acts like a suspension bridge, supporting weak tendons and soft tissue in the foot to relieve the symptoms of plantar fasciitis and PTTD (fallen arches). Positioned laterally, the FootLok Strap supports and protects the lateral ligaments and the peroneal tendons. Positioned medially, the FootLok Strap supports the plantar fascia or the posterior tibial tendon. No other brace offers such versatility. Two independent straps stabilize the midfoot and hindfoot while allowing a safe range of mobility. The TriLok is effective with almost any type of footwear or with no footwear at all. Control: Patent Number: 9,364,363 B2