M.4®’s Comfort Knee Brace

Smooth functionality, light weight, and high stability for active individuals


  • ACL or PCL rupture, in isolation or with secondary injuries (collateral ligament and/or meniscus lesion), severe instability, inoperable.
  • Complex rupture of the collateral ligament and/ or partial cruciate rupture or sprain.
  • Severe collateral ligament instability with meniscus lesion.
  • Cruciate ligament reconstruction/ repair (ACL or PCL rupture, in isolation or with secondary injuries).
  • Meniscus refixation in pre-existing instability of the knee joint.

Product Variety

Size Chart
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RETAILERSmedi USA Retailer network
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The M4s Comfort functional knee brace offers excellent strength, durability and patented technology to provide exceptional performance. The frame design incorporates medi’s “s” frame design and utilizes the time proven four point principle to help control and support knee movement and incorporates a floating buckle system with numbered straps for ease of application and optimum fit. The M4s utilizes the patented Physioglide hinge to accurately match the knee’s natural movement there-by minimizing migration and enhancing compliance and outcomes. The Physioglide offers extension, flexion and immobilization settings for all popular protocols. The compact version is perfectly suited for patients with shorter legs or that have a need for a brace to fit above special footwear such as ski boots.


  • Polycentric Physioglide hinge mimics the rolling motion of the knee for maximum stability and support.
  • Low profile, light weight frame can be shaped to fit making it very comfortable for all day use
  • Full flexion and extension limitation prevents unwanted knee movement
  • Non-slip padding grips the skin to prevent migration
  • Numbered strap system makes it easy to get on and off


M.4 Comfort Knee Brace Donning

M.4 Comfort Knee Brace Features

Size Chart

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M.4s Comfort Knee Brace