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Ossur Unloader Smartdosing Knee Brace


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Lightweight, comfortable and easy to get on and off, the Unloader One knee brace is the ultimate in pain relief for osteoarthritis (OA) sufferers.

New: The Unloader One is now available as an off-the-shelf (without cover) brace. Drawing on twenty years of clinical studies and user feedback, Ossur has completely redesigned the legendary Unloader brace, incorporating new technologies for unrivalled performance. Biomechanical understanding and materials expertise have contributed to a holistic approach that addresses the pain and immobility caused by OA.

The Unloader One brace has 30-50% more unloading power than the original Unloader, with only HALF the weight. This low profile device has a new kind of breathable padding coated with silicone that virtually eliminates migration (slipping or rotation). Not one, but two Dynamic Force Straps work in conjunction with an easy-to-adjust control system which allows patients to better manage their knee pain. The buckle and strapping design makes it easier to apply and remove the brace, repeatedly achieving a snug fit without having to adjust it. Even patients with arthritic hands will find the brace easier to apply.

New:SmartDosing, powered by Boa®Technology, provides patients with a simplified, single-hand dosing dial for on-the-fly adjustability of the dual Dynamic Force Straps (DFS), helping them better manage their unicompartmental OA knee pain. And, by utilizing the new SmartDosing dial, users can easily adjust the dual DFS tension right through their clothes.

  • Flexible, low-profile upright contours to patient anatomy and allows use underneath clothing
  • Quick Connect Strapping for tool-free removal and replacement
  • Lightweight frame is perforated for flexibility and ventilation
  • 15.5″ Length
  • Dual Dynamic Force Straps increase unloading capabilities
  • Eliminates rotational tendencies caused by a single strap
  • Tool-free, racheting Dynamic Force Control System enables self-dosing by the patient
  • Quick Fit Buckles with leverage arms enable easy application
  • Easy removal without the need for cumbersome strap adjustment
  • An Aerospacer base material coated with Ossur Sensil Silicone Technology
  • Breathable padding that won’t migrate
  • Optional SmartDosing (extra charge applies)




  • Mild to severe unicompartmental osteoarthritis
  • Unicompartmental knee conditions that require load reduction to affected compartment, such as: Articular cartilage defect repair, Meniscal cartilage repair Avascular necrosis Tibia plateau fracture
  • Normal activities of daily living
  • Thigh circumference: 13.5″ [34.3 cm] to 33″ [83.8 cm]
  • Calf circumference: 9.8″ [25 cm] to 24″ [61.5 cm]
  • All non contact activities




  • Maximum knee support
  • Maximum stabilization
  • Decrease anti-inflammatory medications
  • Decrease knee pain symptoms
  • Improve knee joint function
  • Lightweight support
otsUnloader One – Medial
Part# w. SmartDosing Leg Compartment Size Measuring*
B-240518712 Right Medial Small 12.2 – 14″
B-240618712 Left Medial Small 12.2 – 14″
B-240518713 Right Medial Medium 14 – 16.75
B-240618713 Left Medial Medium 14 – 16.75
B-240518714 Right Medial Large 16.75 – 20″
B-240618714 Left Medial Large 16.75 – 20″
B-240518715 Right Medial XLarge 20 – 24″
B-240618715 Left Medial XLarge 20 – 24″
*Circumference: 6″ below mid-patella
Unloader One – Lateral
SmartDosing Part # Leg Compartment Size Measuring*
B-240528712 Right Lateral Small 12.2 – 14″
B-240628712 Left Lateral Small 12.2 – 14″
B-240528713 Right Lateral Medium 14 – 16.75
B-240628713 Left Lateral Medium 14 – 16.75
B-240528714 Right Lateral Large 16.75 – 20″
B-240628714 Left Lateral Large 16.75 – 20″
B-240528715 Right Lateral XLarge 20 – 24″
B-240628715 Left Lateral XLarge 20 – 24″
*Circumference: 6″ below mid-patella


Insurance Inquiry Form
Please fill out contact information below and a Medicare Specialist will contact you as soon as possible. (Usually within 24-48 hours)

Additional information

Weight 36 oz
Dimensions 18 x 9 x 7 in

Left, Right


Medial, Lateral


Small, Medium, Large, XLarge


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