Prosthesis suspension liner sealing cap and prosthesis suspension system

A prosthesis liner system comprising:

• a porous prosthesis liner having a perforated distal end, and
• a valve for said porous prosthesis liner, the valve comprising:
• a first portion comprising:
• means for locating the valve on the distal end of the porous prosthesis liner;
• and
• a frusto-conical shaped inner circumferential band having a first thickness;
• and
• a second portion extending from the first portion of the valve to a peripheral edge of the valve, the second portion comprising a frusto-conical shaped outer circumferential band having a second thickness which is not equal to the first thickness, thereby resulting one of the inner and outer circumferential bands being a thinner circumferential band and the other one of the inner and outer circumferential bands being a thicker circumferential band,
• wherein the thinner circumferential band is resiliently deformable and movable between:
• a first, at rest, position where the thinner circumferential band is adapted to abut a corresponding portion of the distal end of said porous prosthesis liner, and
• a second position where the thinner circumferential band is adapted to be spaced from said corresponding portion of the distal end of said porous prosthesis liner,
• wherein the means for locating the valve on a distal end of the said porous prosthesis liner comprises means for preventing lateral movement of the valve relative to the distal end of the said porous prosthesis liner.