Semi-Open Knee Brace with Polycentric Joint
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Stability Meets Natural Movement.
The Prim AIRTEX T141 is a specialized semi-open knee orthosis designed for superior stabilization without restricting natural movement. It features aluminum polycentric joints on both sides to reinforce the knee against lateral strain. With its intuitive color-coded markers (Blue for thigh, Red for shin) and 100% breathable fabric, it provides a "set-and-forget" comfort level ideal for long-term rehabilitation and daily activities.
Technical Specifications
| Brand | Prim AIRTEX |
| Model | T141 - Semi-Open with Polycentric Joint |
| Material | 100% Breathable Stretch Velour & Aluminum Joints |
| Stabilization | Bilateral Aluminum Polycentric Joints |
| Orientation | Bilateral (Fits both Left and Right knee) |
| Height | 33 cm |
| Special Features | U-shaped patellar pad, buckle-adjust straps, and color markers |
Finding Your Perfect Fit
Measure the circumference around your knee (center of the kneecap) while standing. If you are between sizes, we recommend the larger size for the best fit during inflammatory periods.
| Size | Knee Circumference (cm) | Ideal For |
|---|---|---|
| Small (S) | 32 – 35 cm | Slim / Petite builds |
| Medium (M) | 35 – 38 cm | Standard adult build |
| Large (L) | 38 – 41 cm | Larger / Athletic build |
| XL | 41 – 45 cm | Developed thigh/calf muscles |
| XXL | 45 – 50 cm | Broad / Disproportionate muscle mass |
Frequently Asked Questions
What is a Polycentric Joint?
A polycentric joint mimics the complex natural movement of the human knee, which doesn't just rotate like a simple hinge but also slides. This provides better stability and reduces the risk of the brace "pinching" or shifting during movement.
How do the color markers help?
The Blue marker indicates the proximal area (Thigh), while the Red dot indicates the distal area (Shin). This ensures you never put the brace on upside down, maintaining the correct anatomical alignment of the patellar pad.
Can I wear this under my clothes?
Yes. Despite the aluminum stabilizers, the T141 uses a slim breathable textile that fits discreetly under loose-fitting trousers or sports gear, making it perfect for all-day use at work or home.
Why is the "Open Design" at the thigh important?
Following surgery or trauma, the knee often swells. The semi-open thigh design allows you to adjust the compression levels as the inflammation goes down, providing a custom fit throughout your entire recovery process.