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Unloader One X by Ossur

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Product Description

Unloader One X is a medical device with biomechanical properties that are clinically proven to provide pain relief and functional improvements to people suffering from unicompartmental OA of the knee and degenerative meniscal tears.

The Unloader One X builds on more than 18 years of patient and practitioner experience and is designed with ease of use and effortless wear in mind. Unloader One X improves mobility by providing pain relief from knee osteoarthritis and degenerative meniscal tears.

It features Össur's unique patented and clinically proven 3-point Leverage System that generates unicompartimental unloading of the knee joint.


Lightweight and breathable soft-edge shells conform to your unique leg anatomy. Soft single-seamed straps eliminate bulk at the back of the knee and reduce chafing.

Easy to Use

Alignment guide, color-coded touchpoints, and Quick Fit buckles allow for intuitive donning and doffing. Entire brace is machine washable for easy care and maintenance.

Key Features

  • 3-Point Leverage System consisting of two Dynamic Force System (DFS) Straps, rigid shells and a single upright hinge contribute to a unicompartmental unloading of the knee joint.
  • The unloading is effective only when needed, no condyle pressure during sitting or swing phase.
  • A slender perforated frame with soft edges, contours easily to individual anatomies and remains discreet whether worn over or under clothing.
  • Skin friendly liners and pads as well as a smooth inner surface of shells reduce probability of pressure points.
  • The gastroc strap is positioned over thickest part of calf to help prevent migration.
  • Color coded touchpoints and Quick-Fit buckles increase user-friendliness.
  • Alignment guide on hinge facilitates correct positioning on the leg.
  • Color-coded Quick Fit buckles enable easy application and removal.
  • Entire brace is machine washable (washbag included with product).
  • Easily adaptable to individual needs and anatomical shapes.



  • Moderate to severe unicompartmental knee osteoarthritis
  • Degenerative meniscal tears
  • Other knee conditions that may benefit from unicompartmental unloading

Reimbursement Codes

L1843 and L1851

Available Sizes

XS, S, M, L, XL

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