| 1 | Socket inner face |
| 2 | Hard plastic socket |
| 3 | Hard plastic coupled with foam insert |
| 4 | Hard plastic coupled with gel liner |
Holds prosthetic to body
| 1 | Sleeve : usually a tube made from neoprene or gel attaches from socket to thigh |
| 2 | Gel liner w/ pin or 3-S suspension : usually Silicone or Urethane rolls on skin holding by a suction to the skin, then a mechanical lock occurs between the exterior pin on liner to the socket |
| 3 | Suction socket utilizing gel liner & valve : Gel liner evacautes are via ring, expulsion 1 way valve releases are out |
| 4 | Leather Cuff : cuff that attaches to socket and will go above knee cap, raps around knee |
| 5 | PTS : wedge built into foam insert, suspends socket above knee joint |
The rigid shaft or tube below socket controls the length and attaches socket to foot.
Below are general types with a brief description and function.
| 1 | SACH : Hard internal keel that has no movement with firm a foam cosmesis. |
| 2 | Elastic or Flexible Keel : Simulates ankle motion with out true ankle joint. |
| 3 | Single Axis Foot : Ankle motion in one plane going forward and backward, can be constructed with various keel types. |
| 4 | Multi-axial Foot : Ankle motion in more than one plane, can be constructed with various keel types. |
| 5 | Energy Responsive Foot : Keel is made of composite materials that when loaded by body weight can give return from heel strike to toe off. A good example is how a diving board reacts when someone jumps on, it will load then spring off. This type of foot can be constructed to simulate ankle motion without a true ankle joint or it can be incorporated into a Single Axis or Multi-axial Foot. |