M.4s Comfort Knee Brace

A torn ACL, a knee that buckles on stairs, or a post-surgical joint that still feels unreliable: standard hinged braces often can't keep up. The medi M.4s Comfort knee brace is a functional knee orthosis built for serious ligament injuries, multi-ligament instability, and post-operative rehabilitation where your knee needs structural control in multiple planes of movement.

medi's four-point frame system distributes corrective force across four precisely placed contact points, two above and two below the joint, creating a lever system that controls anterior, posterior, and rotational instability simultaneously. A Physioglide hinge tracks the knee's natural rolling-and-gliding motion rather than a simple pivot, so the brace moves with you instead of fighting your stride. Numbered straps and a floating buckle system make fitting consistent and straightforward every time you put it on.

• Four-point frame design provides maximum structural knee control for ACL, PCL, and multi-ligament injuries
• Physioglide hinge replicates natural knee motion, reducing binding and pressure during movement
• Adjustable extension and flexion stops allow your provider to set precise range-of-motion limits through each rehab stage
• Numbered strap system with floating buckles ensures correct, repeatable application without guesswork
• Comfortable enough for extended daily wear during rehabilitation and return-to-activity phases

Have your physician, physical therapist, or orthotist fit the brace and set your initial range-of-motion limits. Apply straps in numbered order, starting from the strap closest to the knee and working outward. Tighten each strap until the brace feels secure without cutting into skin. As your rehab progresses, your provider can adjust the extension and flexion stops. One brace carries you through the full rehabilitation arc.

• Support Level: Maximum (Functional Orthosis)
• Hinge Type: Physioglide polycentric hinge
• ROM Settings: Adjustable extension and flexion stops (full immobilization to full range)
• Strap System: Numbered straps with floating buckle system
• Manufacturer: medi
• Sold: Individually (left or right)

Consult your healthcare provider for personalized guidance.