Medical professionals

The best new osteoarthritis (OA) bracing technology is available off-the-shelf.

The flexible, perforated shells conform easily to individual anatomy, giving Unloader One OTS an excellent out-of-the-box fit. This brace combines a streamlined, flexible upright with Dual Dynamic Force Straps to generate more unloading leverage than any Unloader to date. Quick fit buckles and breathable liners help ensure better patient compliance.

Indications for Use

  • Mild to severe unicompartmental osteoarthritis (OA)
  • Unicompartmental knee conditions requiring load reduction.
  • Thigh circumferences of 13.5" (34.3cm) to 29" (73.5cm) and calf circumferences of 9.8" (25cm) to 24" (61.5cm)
  • All activity levels, non contact

Product Highlights

  • Dual Dynamic Force Straps increase unloading capabilities and prevent rotation of the brace on the leg 
  • Tool-free,  racheting Dynamic Force Control System enables self-dosing for easier pain management 
  • Quick Fit Buckles with leverage arms enable easy application and removal without the need for cumbersome strap adjustment 
  • Breathable liners featuring Össur Sensil® Silicone Technology on an Aerospacer base material eliminate migration
  • Flexible, low-profile, hinged upright contours to individual anatomy and allows use underneath clothing
  • Quick Connect Strapping for tool-free removal and replacement
  • Lightweight frame is perforated for flexibility and ventilation


Unloader One OTS - Medial
Part# Leg Compartment Size Measuring*
B-240511712 Right Medial Small 12.2 - 14"
B-240611712 Left Medial Small 12.2 - 14"
B-240511713 Right Medial Medium 14 - 16.75
B-240611713 Left Medial Medium 14 - 16.75
B-240511714 Right Medial Large 16.75 - 20"
B-240611714 Left Medial Large 16.75 - 20"
B-240511715 Right Medial XLarge 20 - 24"
B-240611715 Left Medial XLarge 20 - 24"
Circumference: 6" below mid-patella

Unloader One OTS - Lateral
Part# Leg Compartment Size Measuring*
B-240521712 Right Lateral Small 12.2 - 14"
B-240621712 Left Lateral Small 12.2 - 14"
B-240521713 Right Lateral Medium 14 - 16.75
B-240621713 Left Lateral Medium 14 - 16.75
B-240521714 Right Lateral Large 16.75 - 20"
B-240621714 Left Lateral Large 16.75 - 20"
B-240521715 Right Lateral XLarge 20 - 24"
B-240621715 Left Lateral XLarge 20 - 24"
Circumference: 6" below mid-patella

Ossur AcademyÖssur Academy now offers the Unloader One Competency Program. The program is an online training intended to enhance the successful clinical outcomes for the practitioner. This program offers key information and direction on the proper technique in measurement for and fitting of the Unloader One osteoarthritis knee orthosis.

Get more information on the Unloader One Competency Program and other online education resources made available by Össur Academy

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