Prosthesis covering

1. A covering for a prosthetic hand comprising:

a first layer in the form of a glove or mitten configured to cover a prosthetic hand, the first layer comprising an elastomer; and

a second layer disposed over at least part of an interior surface of the first layer, the second layer being unitary and comprising polyurethane, at least a finger portion of the interior surface of the first layer being uncovered by the second layer,

wherein the second layer provides a reduced friction surface between the prosthetic hand and second layer.

2. A covering according to claim 1 , wherein a part of the interior surface of the first layer, which, in use of the covering, is adjacent at least one digit of the prosthetic hand is uncovered.

3. A covering according to claim 2 , wherein a part of the interior surface of the first layer adjacent at least a distal phalange of the prosthetic hand is uncovered by the second layer.

4. A covering according to claim 1 , wherein the first layer is in the form of a glove defining a plurality of sheaths for covering respective individual digits of a prosthetic hand, at least a part of an internal surface of at least one sheath other than a sheath for a thumb of the prosthetic hand is uncovered by the second layer.

5. A covering according to claim 1 , wherein at least a part of a palm area of the interior surface of the first layer is uncovered by the second layer.

6. A covering according to claim 1 , wherein the second layer is disposed over a part of a surface of the first layer at a plurality of spaced apart locations.

7. A covering according to claim 6 , wherein the second layer is unitary at each of the spaced apart locations.

8. A covering according to claim 1 , wherein the second layer is disposed on an exterior surface of the first layer solely over at least one of: the back of the hand; the wrist adjacent the back of the hand; and the side of the hand.

9. A covering according to claim 1 , wherein the second layer defines an exposed surface facing away from the first layer, the exposed surface having a surface roughness of between substantially 15 and substantially 25 according to the VDI, EDM scale.

10. A covering according to claim 1 , wherein the first layer is unitary and the elastomer defines a furthest extent of the first layer.

11. A covering according to claim 1 , wherein the elastomer is a thermoplastic elastomer.

12. A covering according to claim 11 , wherein the elastomer comprises a high temperature vulcanised (HTV) silicone rubber.

13. A covering according to claim 1 , wherein the first layer comprises a textile substrate.

14. A covering according to claim 13 , wherein the elastomer of the first layer is attached to the textile substrate.

15. A covering according to claim 14 , wherein the elastomer of the first layer is one of: disposed substantially on an exterior surface of the covering; and embedded in the elastomer of the first layer.

16. A covering according to claim 13 , wherein the textile substrate comprises a spandex material.

17. A covering according to claim 1 , wherein the second layer is attached to a surface of the first layer.

18. A covering according to claim 1 , wherein the second layer is a film of material on the first layer.

19. A covering according to claim 1 , wherein the second layer comprises polyurethane resin, crosslink agent and filler.

20. A covering according to claim 1 , wherein the second layer comprises a pigment.

21. A covering according to claim 1 , wherein the first layer has a thickness from interior surface to exterior surface of between substantially 0.5 mm and substantially 2 mm.

22. A prosthetic hand comprising a mechanical hand and a covering constructed according to claim 1 .