Short Description
The BioSkin TriLok™ Ankle Brace is a medical-grade stabilizer featuring the patented FootLok™ strap that acts as an "external ligament." Its ultra-thin, 1mm low-profile design fits easily in most shoes to treat Plantar Fasciitis, PTTD, and Ankle Sprains. Hypoallergenic and latex-free, it provides targeted arch and ankle support.
The BioSkin TriLok Ankle Brace is a medical-grade stabilizer widely regarded as the most versatile brace for complex foot and ankle conditions. Unlike bulky, traditional lace-up supports, the TriLok uses a patented three-strap system to mimic the body’s natural ligaments, providing "unloading" and stabilization exactly where you need it most.
The Patented FootLok™ "External Ligament"
The core of the TriLok’s effectiveness is the white FootLok™ strap. This strap acts as an external ligament, allowing you to control the level of lift and support for the arch and midfoot. Because the strap is adjustable, the TriLok can be applied in two distinct ways to treat different injuries:
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Medial Application (For PTTD & Plantar Fasciitis): The FootLok strap pulls upward on the inside of the foot to lift the arch. This "suspension bridge" effect restores foot alignment and relieves the debilitating tension on the posterior tibial tendon and plantar fascia.
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Lateral Application (For Ankle Sprains): The strap pulls upward on the outside of the foot to stabilize the ATFL (Anterior Talofibular Ligament). This prevents the ankle from rolling inward (inversion) during sports or daily walking.
Key Features & Benefits
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Ultra-Low Profile: At only 1mm thick, the TriLok is constructed from thin, breathable materials that fit comfortably inside almost any athletic or dress shoe.
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Hypoallergenic & Latex-Free: Made from BioSkin’s proprietary materials, it is 100% neoprene-free and latex-free, making it ideal for those with sensitive skin or allergies.
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Compressive Undersleeve: The base sleeve provides medical-grade compression to reduce swelling and improve proprioception (the body's awareness of joint position).
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Universal Fit: A single design fits either the Left or Right foot, simplifying your recovery process.
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HSA/FSA Eligible: This orthosis is typically eligible for reimbursement through health savings and flexible spending accounts.
- Available in four sizes . See Size & Fit tab for the sizing chart and measurement information.
- Recommended Manufacturer HCPC : L1906.
Common Indications
The Trilok is indicated for:
- Posterior Tibial Tendon Dysfunction (PTTD): Supports fallen arches and improves foot alignment.
- Plantar Fasciitis: Lifts the arch to reduce morning foot pain and heel tension.
- Ankle Sprains: Provides high-level stability for both lateral and high ankle sprains.
- Peroneal Tendonitis: Supports overused tendons to allow for faster healing.


