Shock Doctor Ultra Knee Support with Bilateral Hinges

A:

While they do look very similar, the level of support is higher in the more expensive version.

The "more basic" version has a Performance Level rating of 2: Moderate support for minor to moderate sprains, muscle strains and unstable joints allowing for use as necessary for recovery.

The higher priced version has a Performance Level rating of 3: Medium stability and support for moderate to major ligament sprains, muscle strains and unstable joints allowing for use as necessary for recovery.