Unity offers the security and freedom of vacuum suspension, but without the sensation and restrictions of a sleeve. This advanced system from Össur effectively addresses volume fluctuation and is totally compatible with Flex-Foot technology.


With the Unity Vacuum System by Össur, there is finally an elevated vacuum system for all users. Whether an above-knee or below-knee, low active or high active, mechanical or microprocessor solution is required, the Unity Vacuum System offers the flexibility to combine a variety of Össur feet and knees to achieve the optimal combination of equipment for each unique user.

Unity is only recommended with sleeveless Seal-In technology


  • No sleeve required: Greater mobility and user acceptance

  • 15-22 in Hg Vacuum: Effective volume stabilization

  • Simple design: Quick and easy to achieve/release vacuum

  • Independent pump: Foot function uncompromised

  • Light weight: Complete system weighs only 130g