The Össur Unloader X is a clinically proven knee brace designed specifically for people living with unicompartmental knee osteoarthritis (OA) — that is, arthritis affecting one side of the knee joint rather than the entire joint.
Rather than simply supporting the knee, the Unloader X works by physically shifting load away from the damaged compartment of the knee and redistributing it to the healthier side. This mechanical offloading is what sets it apart from general knee supports or compression sleeves.
The knee joint has two main compartments — medial (inner) and lateral (outer). In unicompartmental OA, cartilage breakdown tends to concentrate on one side, causing pain, stiffness, and a gradual change in leg alignment.
The Unloader X uses a 3-point leverage system to apply a gentle corrective force across the knee, effectively tilting the joint slightly to take pressure off the worn compartment. This reduces the load through damaged cartilage with every step.
The brace features:
The Unloader X is indicated for patients presenting with:
Primary Indication
Symptom Profile
Patient Profile
Unloader knee bracing at Cornerstone is assessed and fitted by a clinician, not simply supplied off the shelf. A proper fitting involves:
Most knee braces work by compressing or stabilising the joint. The Unloader X does something different — it physically shifts load away from the damaged part of your knee using a three-point leverage system. This means less pressure through worn cartilage with every step you take. It’s a medical-grade orthotic device, not a general support sleeve.
For the right patient, yes — significantly. Clinical studies show meaningful reductions in pain during walking, stairs, and daily activity. Many patients also report needing less pain medication and being able to do more with their day. Results vary depending on the severity of arthritis and individual factors, which is why a proper clinical assessment matters before fitting.
The Unloader X is designed to be worn during daily activity, so comfort has been a major focus in its design. It uses a Sensil silicone lining that grips the skin gently without needing tight straps, and it’s made from a lightweight carbon composite frame. Most patients adjust to wearing it within a week or two. If you experience skin irritation or pressure points, let your clinician know so the fit can be adjusted.
Yes — that’s one of its key purposes. The Unloader X is designed to support activity, not restrict it. Patients use it for walking, cycling, swimming preparation, golf, gardening, and low-impact recreational sport. High-impact activities should be discussed with your clinician. If you’re returning to sport after injury or surgery, your rehabilitation program will guide what’s appropriate.
With proper care, the Unloader X typically lasts 2–3 years with regular daily use. The frame is durable, but the lining and straps may require replacement over time. We can advise on maintenance and when components need refreshing.
A fitting review is part of our process at Cornerstone. If something feels off — whether it’s comfort, fit, or how the offloading feels during activity — contact us for a follow-up adjustment. Getting the fit right is an ongoing process, not a one-time event.
Our friendly and hardworking staff will endeavour to response to your queries and booking requests within the same day.
We accept referrals from GP (CDM/TCA Plans), NDIS (Plan and Self Managed), Workcover, TAC, DVA, Support at Home (Aged Care) and all other private health funds.