Check the listing for details. left ossur k2 sensation DP Hydraulic ankle Prosthetic foot. Condition: Used. Listed at 285.00 USD. left ossur k2 sensation DP Hydraulic ankle Prosthetic foot. ossur k2 sensation DP Hydraulic ankle prosthetic foot. Size 28, Category 4. Left Category 4, 215-251 Size 28 Absolutely no issues with the item. Perfect condition. K2 Sensation is a comfortable walking prosthesis with a flexible full length fiberglass keel and mutiaxial foam core. With smooth progression from heel strike to toe-off, K2 Sensation is designed to promote user confidence and stability. K2 Sensation with D/P Flexion offers 9 degrees of dorsi and plantarflexion during stance phase to help improve stability on ramps and when transitioning from sitting to standing. Swing phase dorsiflexion is designed to reduce the risk of trips and falls. independent stiffness adjustment of dorsi- and plantarflexion enables you to customize performance for each amputee user.