The DuraStance 900 is a full leg replacement engineered for continuous load-bearing work across 16-hour industrial shifts, featuring a wide-base foot plate with adaptive pressure distribution across 24 articulated micro-zones that eliminate localized stress accumulation. The knee joint uses a passive hydraulic damper that absorbs compressive forces from prolonged standing and heavy lifting, feeding residual energy back into the ankle for ease of motion. An onboard fatigue-suppression system blocks proprioceptive exhaustion signals from reaching the spinal interface — the legs simply do not report tired. The tibial housing includes four modular accessory rails compatible with Fenris tool-mount attachments.

The DuraStance 900 is the dominant limb in the Great Lakes industrial labor sector — fabrication plants, port loading docks, and vertical farm operations run on workers who can stand and carry for shifts that would destroy biological joints within years. Fenris sells these direct through employer procurement contracts, and many workers receive them as a condition of employment rather than personal choice. The street name 'Plantfeet' reflects their ubiquity on vertical farm floors, where the wide base plate prevents sinking into growing medium.